Gmat Sentence Correction 89, 90

89). John Smith provides information on the conditions that lead women to a gynecologist, and he notes that these conditions can, and sometimes are, used in the promotion of surgery which is not needed.

(A) and he notes that these conditions can, and sometimes are, used in the promotion of surgery which is not needed

(B) noting that these conditions can be, and sometimes are, used to promote needless surgery

(C) and notes that they could and sometimes are used unnecessarily in promoting surgery

(D) sometimes promoting needless surgery

(E) which they use sometimes to promote unnecessary surgery

90). Machines replacing human labor, there was wide anticipation that the workweek would continue to become shorter.

(A) Machines replacing human labor, there was wide anticipation that

(B) When machines replaced human labor, there was wide anticipation

(C) As machines replaced human labor, it was widely anticipated that

(D) Insofar as machines replaced human labor, it was widely anticipated

(E) Human labor being replaced by machines, there was wide anticipation that

Answers --

89). B is the best choice.
A - incorrect - wordy...Further "can be (used) and sometimes are used"..omits "be"
C, E - incorrect - ambiguous "they"
D - incorrect - who promotes needless surgery ?...not clear....Conditions or John Smith?

90). Best choice C - only choice to use past tense correctly throughout.
Why It is right in this choice, the link below explains ...

http://gmat-grammar.blogspot.com/2006/07/it-as-subject-of-sentence.html

Gmat Sentence Correction 87, 88

87). It takes a deft balance between savings discipline, investment knowledge, risk taking, luck, and time to raise a million dollars through investments.

(A) It takes a deft balance between

(B) Deft balancing is needed between

(C) Deftly balanced, it takes

(D) It takes a deft balance of

(E) A deft balance is what one needs among

88). Last year, land values in most parts of the pinelands rose almost so fast, and in some parts even faster than what they did outside the pinelands.

(A) so fast, and in some parts even faster than what they did

(B) so fast, and in some parts even faster than, those

(C) as fast, and in some parts even faster than, those

(D) as fast as, and in some parts even faster than, those

(E) as fast as, and in some parts even faster than what they did


Answers --

87). D is the best choice.
A, B - incorrect - usage of between is wrong here...."between" is used when we consider only two objects. Further correct idiom is "balance of"
C - incorrect - Awkward.....Deftly balanced seems to modify the full sentence
E - incorrect - Changes the meaning (deft balance among a, b and c ) ---"among" incorrect here, we need "of" here.
"Deft balance of" is not same as "Deft balance among"
E suggests that "Deft balance" is the only required object among all the other objects "savings discipline, investment knowledge, risk taking, luck and time" ...which is incorrect.

88). D - correct - idiomatic
Comparison in this sentence is between the most parts of pineland and parts outside the pineland.
A, B, C - incorrect - correct idioms are "as...as" and "so..that"
E - incorrect - "they" referring to what ?

Gmat Sentence Correction 85, 86

85). Defense attorneys have occasionally argued that their clients' misconduct stemmed from a reaction to something ingested, but in attributing criminal or delinquent behavior to some food allergy, the perpetrators are in effect told that they are not responsible for their actions.

(A) in attributing criminal or delinquent behavior to some food allergy

(B) if criminal or delinquent behavior is attributed to an allergy to some food

(C) in attributing behavior that is criminal or delinquent to an allergy to some food

(D) if some food allergy is attributed as the cause of criminal or delinquent behavior

(E) in attributing a food allergy as the cause of criminal or delinquent behavior

86). The voluminous personal papers of Thomas Alva Edison reveal that his inventions typically sprang to life not in a flash of inspiration but evolved slowly from previous works.

(A) sprang to life not in a flash of inspiration but evolved slowly

(B) sprang to life not in a flash of inspiration but were slowly evolved

(C) did not spring to life in a flash of inspiration but evolved slowly

(D) did not spring to life in a flash of inspiration but had slowly evolved

(E) did not spring to life in a flash of inspiration but they were slowly evolved

Answers --

85). B is the correct answer.
A, C, E - incorrect - "in attributing criminal or delinquent behavior" is modifying perpetrators which is not correct because the defense attorneys are attributing behavior to food allergies.
D - incorrect - doesn't identifies the attributors at all.

86). C is the correct answer - Parallelism - ...not...but..
A, B - incorrect - violating parallelism - right form...not in....but in...
D - incorrect - wrong tense
E - incorrect - passive

Gmat Sentence Correction 83, 84

83). Aho, a Kiowa matriarch, held festivals in her home, they featured the preparation of great quantities of ceremonial food, the wearing of many layers of colorful clothing adorned with silver, and the recounting of traditional tribal jokes and stories.

(A) Aho, a Kiowa matriarch, held festivals in her home, they featured

(B) Festivals were held in Aho, a Kiowa matriarchs home, which featured

(C) Aho, who was a Kiowa matriarch in her home, held festivals featuring

(D) In her home, Aho, a Kiowa matriarch, held festivals that featured

(E) Aho, a Kiowa matriarch, held festivals in her home that featured

84). An array of tax incentives has led to a boom in the construction of new office buildings; so abundant has capital been for commercial real estate that investors regularly scour the country for areas in which to build.

(A) so abundant has capital been for commercial real estate that

(B) capital has been so abundant for commercial real estate, so that

(C) the abundance of capital for commercial real estate has been such,

(D) such has the abundance of capital been for commercial real estate that

(E) such has been an abundance of capital for commercial real estate,


Answers --

83). D is the best answer.
A - incorrect - referent of "they" is not present or in other words is unclear
B - incorrect - Aho, a Kiowa matriarchs home, makes it wrong as Aho is Kiowa matriarch and not the home
C - incorrect - is unnecessarily wordy -- "who was" part
E - incorrect - ambiguous - not clear whether the festival or the home featured the preparation.

84). Choice A is the correct answer.
B - incorrect - there is repetition of "so" as such it is illogical,
C, E - incorrect - "that" has been omitted which makes both the choices grammatically incorrect.
D - incorrect - seperation of "has" and "been" is vague and incorrect.
C, D ,E - incorrect - "such" seems to convey the meaning "of a kind" and it is not stressing "abundant" as it should do otherwise.

Gmat Sentence Correction 81, 82

81). Despite the recent election of a woman to the office of prime minister, the status of women in Pakistan is little changed from how it was in the last century.

(A) is little changed from how it was

(B) is a little change from how it was

(C) has changed little

(D) has changed little from how it has been

(E) is little changed from the way it was

82). Although the lesser cornstalk borer is widely distributed, control of them is necessary only in the South.

(A) the lesser cornstalk borer is widely distributed, control of them is

(B) widely distributed, measures to control the lesser cornstalk borer are

(C) widely distributed, lesser cornstalk borer control is

(D) the lesser cornstalk borer is widely distributed, measures to control it are

(E) it is widely distributed, control of the lesser cornstalk borer is

Answers --

81). C is the best choice.
A, B, D, E - incorrect - "it" referring to what? is it the status of women in the last century or something else in the last century that we compare the current women status with.
A, B, E - incorrect - "little changed" is incorrect..(little changed means changed to some extent but not
much....whereas...changed little implies did not changed at all)
B - incorrect - use of "is" (present tense) is incorrect
D - incorrect - sentence says "last century" so "how it has been" is unnecessary to state.

82). D is the best choice.
A - incorrect - "them" is refering to "lesser cornstalk borer" so must be singular.
B - incorrect - "widely distrbuted" is modifying "measures" , should modify "the lesser cornstalk borer".
C - incorrect - changing the meaning - suggests that lesser cornstalk borer control is widely distributed instead of lesser cornstalk borer.
E - incorrect - "it" referring to what ? "lesser cornstalk borer"or "control"

Gmat Sentence Correction 79, 80

79). Federal incentives now encourage investing capital in commercial office buildings despite vacancy rates in existing structures that are exceptionally high and no demand for new construction.

(A) investing capital in commercial office buildings despite vacancy rates in existing structures that are exceptionally high and

(B) capital investment in commercial office buildings, even though vacancy rates in existing structures are exceptionally high and there is

(C) capital to be invested in commercial office buildings even though there are exceptionally high vacancy rates in existing structures with

(D) investing capital in commercial office buildings even though the vacancy rates are exceptionally high in existing structures with

(E) capital investment in commercial office buildings despite vacancy rates in existing structures that are exceptionally high, and although there is


80). A large and increasingly influential sector of publishing, 20 percent of all the National and American Book awards since 1950 have gone to university-press books.

(A) A large and increasingly influential sector of publishing, 20 percent of all the National and American Book awards since 1950 have gone to university-press books.

(B) A large and increasingly influential sector of publishing, university-press books have won 20 percent of all the National and American Book awards since 1950.

(C) Increasingly influential as a large sector of publishing, 20 percent of all the National and American Book awards since 1950 have gone to university-press books.

(D) Since 1950, a large and increasingly influential sector of publishing, 20 percent of all the National and American Book awards have gone to university-press books.

(E) Since 1950, university-press books, a large and increasingly influential sector of publishing, won 20 percent of all the National and American Book awards from then on.

Answers --

79). Best choice is B - Federal incentives now encourage (capital investment) (noun) in commercial office buildings, even though vacancy rates in existing structures are exceptionally high and there is no demand for new construction(maintains parallelism)
A, E - incorrect - suggest structures are high and not the vacancy rates C -awkward - passive voice
D - incorrect - it should be and instead of with, further word that follows encourage must be a noun and not a verb.

80). B is the best choice
A, C, D - incorrect - dangling modifier ( Book awards is modifying sector of publishing)
E - incorrect - Wrong tense..it should be present perfect tense -1950 --- till date.
Also from then on is redundant.

Gmat Sentence Correction 77, 78

77). Oberlin College in Ohio was a renegade institution at its 1833 founding for deciding to accept both men and women as students.

(A) at its 1833 founding for deciding to accept

(B) for the decision at its 1833 founding to accept

(C) when it was founded in 1833 for its decision to accept

(D) in deciding at its founding in 1833 to accept

(E) by deciding at its founding in 1833 on the acceptance of

78). In feudal Europe, urban areas developed from clusters of houses where peasants lived and commuted to farmlands in the countryside, unlike homesteading policies in the American West that required residency on the land itself in order to obtain eventual ownership.

(A) In feudal Europe, urban areas developed from clusters of houses where peasants lived and commuted to farmlands in the countryside, unlike homesteading policies in the American West that

(B) In feudal Europe, urban areas developed from clusters of houses where peasants lived and from which they commuted to farmlands in the countryside, but in the American West homesteading policies

(C) Unlike feudal Europe where urban areas developed from clusters of houses where peasants lived and commuted to farmlands in the countryside, the American West's homesteading policies

(D) Unlike feudal Europe where urban areas developed from clusters of houses where peasants lived and commuted to farmlands in the countryside, the homesteading policies of the American West

(E) Urban areas developed from clusters of houses where peasants lived from which they commuted to farmlands in the countryside in feudal Europe, unlike the American West where homesteading policies


Answers --

77). Best choice is D
A -- incorrect -- implies - as if Oberlin College was a renegade institution specifically at its founding which was for a very short duration.
B -- incorrect -- implies - as if there were more than one founding.
C -- incorrect -- implies - as if it was founded for the decision to accept men and women
E -- incorrect -- wordy - "on the acceptance of."

78). The best choice is B -- Correctly comparing fuedal Europe to American West
A, C, D -- incorrect -- comparing Europe to policies.
E -- incorrect -- awkward.

Gmat Sentence Correction 75, 76

75). It is an oversimplified view of cattle raising to say that all one has to do with cattle is leave them alone while they feed themselves, corral them and to drive them to market when the time is ripe.

(A) all one has to do with cattle is leave them alone while they feed themselves, corral them, and to

(B) all one has to do with cattle is to leave them alone to feed themselves, to corral them, and

(C) all one has to do with cattle is leave them alone while they feed themselves and then corral them and

(D) the only thing that has to be done with cattle is leave them alone while they feed themselves, corral them, and

(E) the only thing that has to be done with cattle is to leave them alone while they feed themselves, to corral them, and

76). Although dozens of New York's small museums are either devoted to local history of various ethnic groups, there are many one-of-a-kind museums from Manhattan to the Bronx that are open for exploration on summer weekends.

(A) Although dozens of New York's small museums are either devoted to local history or various ethnic groups, there are

(B) Although dozens of New York's small museums are devoted to local history or various ethnic groups,

(C) Dozens of New York's small museums are devoted to local history or various ethnic groups, but there are

(D) Dozens of New York's small museums are devoted to local history or various ethnic groups, and there are also

(E) Devoted to local history or various ethnic groups, dozens of New York's small museums and also


Answers --

75). C is the best answer .
A, B -- incorrect -- parallelism "to leave them, to corral them and to drive them" would be the correct form.
D, E -- incorrect -- use of "the only thing" is wrong as talking about more than one action.

76). Best answer is D.
A, B -- incorrect -- use of although incorrect, it is used to show contrast, but there is no contrast here.
C -- incorrect -- use of "but" wrong as sentence does not have a contrast
E -- incorrect -- awkward

Gmat Sentence Correction 73, 74

73). Building large new hospitals in the bistate area would constitute a wasteful use of resources, on the basis of avoidance of duplicated facilities alone.

(A) on the basis of avoidance of duplicated facilities alone

(B) on the grounds of avoiding duplicated facilities alone

(C) solely in that duplicated facilities should be avoided

(D) while the duplication of facilities should be avoided

(E) if only because the duplication of facilities should be avoided

74). Even though its per capita food supply hardly increased during two decades, stringent rationing and planned distribution have allowed the People’s Republic of China to ensure nutritional levels of 2,000 calories per person per day for its population.

(A) Even though its per capita food supply hardly increased during

(B) Even though its per capita food supply has hardly increased in

(C) Despite its per capita food supply hardly increasing over

(D) Despite there being hardly any increase in its per capita food supply during

(E) Although there is hardly any increase in per capita food supply for


Answers --

73). Passive constructions are not always wrong on GMAT
E - correct - if only because is correct idiomatic usage -- the main clause needs to be followed logically by because hence if only because is absolutely correct here.
A - incorrect - wordy and illogical
B,C - incorrect - duplicated facilities .... duplication should be avoided and not the facilities...
C - incorrect - in that unidiomatic
D - incorrect - Usage of while not right

74). B is the best answer.
OE - In choice A, the simple past tense hardly increased does not match the present perfect have allowed; consequently, it seems that two different time periods are being discussed. In B, the best choice, has hardly increased parallels have allowed to indicate that the events described took place at the same time. Also in is the best word here for making a comparison between the beginning and the end of the twenty-year period. Choices C and D are awkward and unidiomatic, and choice E fails to specify where there was no increase in per capita food supply.

Gmat Sentence Correction 70, 71, 72

70). Unlike a typical automobile loan, which requires a fifteen- to twenty-percent down payment, the lease-loan buyer is not required to make an initial deposit on the new vehicle.

(A). the lease-loan buyer is not required to make

(B). with lease-loan buying there is no requirement of

(C). lease-loan buyers are not required to make

(D). for the lease-loan buyer there is no requirement of

(E). a lease-loan does not require the buyer to make

71). . In his research paper, Dr. Frosh, medical director of the Payne Whitney Clinic, distinguishes mood swings. which may be violent without their being grounded in mental disease, from genuine manic-depressive psychosis.

(A). mood swings, which may be violent without their being grounded in mental disease, from genuine manic-depressive psychosis

(B). mood swings, perhaps violent without being grounded in mental disease, and genuine manic-depressive psychosis ,

(C). between mood swings, which may be violent without being grounded in mental disease, and genuine manic-depressive psychosis

(D). between mood swings, perhaps violent without being grounded in mental disease, from genuine manic-depressive psychosis

(E). genuine manic-depressive psychosis and mood swings, which may be violent without being grounded in mental disease

72). Paleontologists believe that fragments of a primate jawbone unearthed in Burma and estimated at 40 to 44 million years old provide evidence of a crucial step along the evolutionary path that led to human beings.

(A). at 40 to 44 million years old provide evidence of

(B). as being 40 to 44 million years old provides evidence of

(C). that it is 40 to 44 million years old provides evidence of what was

(D). to be 40 to 44 million years old provide evidence of

(E). as 40 to 44 million years old provides evidence of what was

Answers -

70). Choice E, the best answer - correctly uses a parallel construction to draw a logical comparison: Unlike a typical automobile loan,... a lease-loan....

A - incorrect - illogically compares an automobile loan, an inanimate thing, with a lease-loan buyer, a person.

C - incorrect - buyers makes the comparison inconsistent in number as well as illogical.

B, D - incorrect - are syntactically and logically flawed because each attempts to compare the noun loan and a prepositional phrase: with lease-loan buying in B and/or the lease-loan buyer in D. These choices are also imprecise and awkward.

71). The best choice is C - uses the idiomatically correct expression distinguishes between x and y and because it provides a structure in which the relative clause beginning "which may be violent" clearly modifies "mood swings".

A, B, D, E - incorrect - use distinguishes in unidiomatic constructions. Additionally, their in A is intrusive and unnecessary, and the modifier of mood swings in B and D (perhaps violent) is awkward and less clear than the more developed clause which may be violent.

72). D, the best choice - correctly follows estimated with to be. The other choices present structures that are not idiomatic when used in conjunction with estimated.

A - incorrect - unidiomatic

B, C, E - incorrect - all mismatch the singular verb "provides" with its plural subject "fragments" .Further in C and E, what was is unnecessary and wordy. In choice C, the use of the verb phrase estimated that it is produces an ungrammatical sentence.

Gmat Sentence Correction 67, 68, 69

67). Carbon-14 dating reveals that the megalithic monuments in Brittany are nearly 2, 000 years as old as any of their supposed Mediterranean predecessors.

(A) as old as any of their supposed

(B) older than any of their supposed

(C) as old as their supposed

(D) older than any of their supposedly

(E) as old as their supposedly

68). The only way for growers to salvage frozen citrus is to process them quickly into juice concentrate before they rot when warmer weather returns.

(A) to process them quickly into juice concentrate before they rot when warmer weather returns

(B) if they are quickly processed into juice concentrate before warmer weather returns to rot them

(C) for them to be processed quickly into juice concentrate before the fruit rots when warmer weather returns

(D) if the fruit is quickly processed into juice concentrate before they rot when warmer weather returns

(E) to have it quickly processed into juice concentrate before warmer weather returns and rots the fruit

69). Some bat caves, like honeybee hives, have residents that take on different duties such as defending the entrance, acting as sentinels and to sound a warning at the approach of danger, and scouting outside the cave for new food and roosting sites.

(A) acting as sentinels and to sound

(B) acting as sentinels and sounding

(C) to act as sentinels and sound

(D) to act as sentinels and to sound

(E) to act as a sentinel sounding


Answer -

67). B is the best choice – “older than” makes the point of comparison clear. B also uses the adjective "supposed" correctly.

A, C, E – incorrect – Illogical comparison - The expression as old as indicates equality of age, but the sentence indicates that the monuments by Brittany monuments predate the Mediterranean 2,000 years

D, E – incorrect – adverb “supposedly” used to modify the noun phrase “Mediterranean predecessors”.

68). The best choice is E - has parallel infinitives and uses “to” to refer unambiguously to citrus fruit. The cause-and-effect also expresses the relationship between the return of warmer weather and the rotting of the fruit. For parallelism, the linking verb “is” should link two infinitives : The only way to salvage. . . is to process.

A – incorrect - the plural pronouns “them” and “they” do not agree with the singular noun “citrus”.

B, C, D – incorrect - do not begin with an infinitive. and all present pronoun errors : the plural pronouns “them” and “they” grammatically refer to citrus or fruit and doesnot/cannot refer to farmers.

69). B is the best choice - Because the verb phrases used to describe the bats' duties are governed by the phrase different duties such as, they should each be expressed in the present participial (or "-ing") form to parallel “defending” and “scouting”. Only B uses the correct idiom, and observes parallelism.

A, C, D, E - incorrect - all violate parallelism by employing infinitives (to. . . ) in place of participial destinations.

Gmat Sentence Correction 65, 66

65). The Wallerstein study indicates that even after a decade young men and women still experience some of the effects of a divorce occurring when a child.

(A) occurring when a child

(B) occurring when children

(C) that occurred when a child

(D) that occurred when they were children

(E) that has occurred as each was a child


66). Since 1981, when the farm Journal began, the number of acres overseen by professional farm-management companies have grown from 48 million to nearly 59 million. an area that is about Colorado 's size.

(A) have grown from 48 million to nearly 59 million, an area that is about Colorado 's size

(B) have grown from 48 million to nearly 59 million, about the size of Colorado

(C) has grown from 48 million to nearly 59 million, an area about the size of Colorado

(D) has grown from 48 million up to nearly 59 million, an area about the size of Colorado 's

(E) has grown from 48 million up to nearly 59 million, about Colorado 's size

Answers -

65). Choice D is best. The phrasing “a divorce that occurred when they were children” correctly uses the relative clause that occurred to modify a divorce and includes a pronoun and verb (they were) that refer unambiguously to their antecedent. men and women.

A – incorrect - the singular child does not agree with the plural men and women. Further this choice incorrectly introduces the when... phrase with occurring [occurring is a progressive verb indicating continuity in present, however we are concerned with the divorce that occured when men or women(now) were children], thus illogically making divorce the grammatical referent of when a child.

B – incorrect - replaces child with children but otherwise fails to correct a 's structure and errors of logic.

C – incorrect – corrects only the error created by occurring.

E – incorrect - includes an incorrect verb tense (has occurred) and replaces wrongly “when” with “as”. Further “each was” improperly refers to men and women.

66). C is the best answer - An area about the size of Colorado clearly describes a rough equivalence between the area of Colorado and the area overseen by the companies.

A, B – incorrect - the plural verb “have” does not agree with the singular subject “number”.

D, E – incorrect - unidiomatic; the correct expression is "from x to y".

Gmat Sentence Correction 63, 64

63). Among lower- paid workers, union members are less likely than non union members to be enrolled in lower- end insurance plans imposing stricter limits on medical services and requiring doctors to see more patients, and spend less time with each.

A). imposing stricter limits on medical services and requiring doctors to see more patients, and spend

B). imposing stricter limits on medical services , requiring doctors to see more patients, and spending

C). that impose stricter limits on medical services, require doctors to see more patients, and spend

D). that impose stricter limits on medical services and require doctors to see more patients, spending

E). that impose stricter limits on medical services, requiring doctors to see more patients and spending

64). one automobile manufacturer has announced plans to increase the average fuel efficiency of its sport utility vehicles by 25 percent over the next five years, amounting to roughly five miles per gallon, and representing the first significant change in the fuel efficiency of any class of passenger vehicle in almost two decades.

A). amounting to roughly five miles per gallon, and representing

B). amounting to roughly five miles per gallon, and it would represent

C). an increase that would amount to roughly five miles per gallon and it would represent

D). an increase that would amount to roughly five miles per gallon and would represent

E). which is an increase amounting to roughly five miles per gallon, representing



Answer -

63). D is the best choice.

A,B – incorrect - insurance plans are not imposing anything

C – incorrect – Plans can’t spend time - plans that impose X, (that) require Y and (that) spend Z

E – incorrect - plans that impose X, (that) requiring Y and (that) spending Z. - Lacks Parallelism and plans can't spend less time

64). D is the best choice.

A,B,E -- incorrect -- What is amounting ? – an increase – Thus option C or D

C -- incorrect -- “it” is not required.

Gmat Sentence Correction 61, 62

61). Although the first pulsar, or rapidly spinning collapsed star, to be sighted was in the summer of 1967 by graduate student Jocelyn Bell, it had not been announced until February, 1968.

A) Although the first pulsar, or rapidly spinning collapsed star, to be sighted was in the summer of 1967 by graduate student Jocelyn Bell, it had not been announced until February, 1968.

B) Although not announced until February, 1968, in the summer of 1967 graduate student Jocelyn Bell observed the first pulsar, or rapidly spinning collapsed star, to be sighted.

C). Although observed by graduate student Jocelyn Bell in the summer of 1967, the discovery of the first sighted pulsar, or rapidly spinning collapsed star had not been announced before February, 1968.

D). The first pulsar, or rapidly spinning collapsed star, to be sighted was observed in the summer of 1967 by graduate student Jocelyn Bell, but the discovery was not announced until February, 1968.

E) The first sighted pulsar, or rapidly spinning collapsed star, was not announced until February, 1968, while it was observed in the summer of 1967 by graduate student Jocelyn Bell.

62). During the same period in which the Maya were developing a heiroglphic system of writing, the Aztec people also developed a written language, but it was not as highly sphisticated as that of the Maya and was more pictographic in nature.

A). but it was not as highly sphisticated as that of the Maya and was

B). but it was not as highly sophisticated as the Maya, being

C). but, not as highly sophisticated as the Maya's, was

D). not as highly sphisticated as that of the Maya, however, being

E). not as highly sphisticated as the Maya's however, it was


Answer -

61). Best answer choice is D

A – incorrect – usage of past perfect tense incorrect here.

B – incorrect – dangling modifier—“Although not announced”…. “ graduate student Jocelyn Bell”

C – incorrect – dangling modifier – “observed”.. “discovery of”

E – incorrect – usage of “while” is wrong here. Further the sentence conveys the idea that the pulsar was announced which is wrong – sighting was announced instead.

62). A is the best choice.

B– incorrect – wrong comparison – comparing system of writing with Maya. Further options having “being” in them must be avoided on GMAT

C, D, E – incorrect –Subject of the sentence not clear.

E – incorrect – run-on sentence

Gmat Sentence Correction 60

60). A star will compress itself into a white dwarf, a neutron star, or a black hole after it passes through a red giant stage, depending on mass.

(A). A star will compress itself into a white dwarf, a neutron star, or a black hole after it passes through a red giant stage, depending on mass.

(B). After passing through a red giant stage, depending on its mass, a star will compress itself into a white dwarf, a neutron star, or a black hole.

(C). After passing through a red giant stage, a star's mass will determine if it compresses itself into a white dwarf, a neutron star, or a black hole.

(D). Mass determines whether a star, after passing through the red giant stage, will compress itself into a white dwarf, a neutron star, or a black hole.

(E). The mass of a star, after passing through the red giant stage, will determine whether it compresses itself into a white dwarf, a neutron star, or a black hole.

Answer -

60). D is the best choice -- Mass determines whether a star, after passing through the red giant stage, will compress itself into a white dwarf, a neutron star, or a black hole.
(Read the sentence without the words stated in orange color.)

A - incorrect -- dangling modifier...(depending on mass)

B - incorrect -- "its" refers to the red giant stage's mass.

C - incorrect -- star's mass will determine if it compress itself...again here it refers to mass rather than star.

E - incorrect -- Mass of start after passing....it is star that is passing and not the mass.

Gmat Sentence Correction 58, 59

58). There are hopeful signs that we are shifting away from our heavy reliance on fossil fuels: more than ten times as much energy is generated through wind power now than it was in 1990.

A). generated through wind power now than it was

B). generated through wind power now as it was

C). generated through wind power now as was the case

D). now generated through wind power as it was

E). now generated through wind power than was the case.


59). The computer company has announced that it will purchase the color-printing divison of a rival company for $ 950 million, which is part of a deal that will make it the largest manufacturer in the office color-printing market.

A). million, which is part of a deal that will make

B). million, a part of a deal that makes

C). million, part of a deal making

D). million as a part of a deal to make

E). million as part of a deal that will make


Answers -

58). C is correct answer - correct idiom “as X as Y”

A,B,D – incorrect – no clear referent for “it”

E – incorrect – “than” is used incorrectly in this option.

59). E is the best choice.

B,C,D – incorrect –wrong tense usage -- present tense is used instead of future tense

A – incorrect – “which” –referrent not clear..

Note – Always remember a participle phrase as in C here, is used for an event in the past or which is going on at present but never for the future – the reason why again C is wrong. C is basically changing the meaning of the sentence.

Gmat Sentence Correction 56, 57

56). Some patients who do not respond therapies of depression may simply have received inadequate treatment, having, for example been prescribed a drug as a dosage too low to be effective or having been taken off a drug too soon.

(A). having, for example been prescribed a drug as a dosage too low to be effective or having been

(B). having, for example, a drug prescription that was ineffective because the dosage was too low, or being

(C). as, for example, having too low of a dosage of prescribed drug for it to be effective, or being

(D). when they have, for example, been prescribed too low a drug dosage for it to be effective, or were

(E). for example, when they have a drug prescription with a dosage too low to be effective, or been

57). Officials at the United States Mint believe that the Sacagawea dollar coin will be used more as a substitute for four quarters rather than for the dollar bill because its weight, only 8.1 grams, is far less than four quarters, which weigh 5.67 grams each.

(A). more as a substitute for four quarters rather than for the dollar bill because its weight, only 8.1 grams, is far less than

(B). more as a substitute for four quarters than the dollar bill because it weighs only 8.1 grams, far lighter than

(C). as a substitute for four quarters more than for a dollar bill because it weighs only 8.1 grams, far less than

(D). as a substitute for four quarters more than the dollar bill because its weight of only 8.1 grams is far lighter than it is for
(E). as a substitute more for four quarters rather than for the dollar bill because its weight, only 8.1 grams, is far less than it is for


Answers -

56). A is the best choice. “having….been” is correct usage as it maintains parallelism.

B – incorrect – idea conveyed by this option is that a drug prescription was ineffective which cannot be true.

C – incorrect -- parallelism is violated here – having … being

D – incorrect -- wrong tense and violating parallelism

E – incorrect -- violating parallelism


57). C is the best choice.

A,D,E – incorrect – violating parallelism – it should be “weighs” and not “weights”

B – incorrect – incorrectly comparing “as a substitute” with “four quarters”

Gmat Sentence Correction 54, 55

54). A new phenomena, which is visible at Managua's major intersections, are waves of vendors and beggars, which include many children and mob cars at the stoplights.

(A) A new phenomena, which is visible at Managua's major intersections, are waves of vendors and beggars, which include many children and

(B) Visible at Managua's major intersections are waves of vendors and beggars with many children, new phenomena that

(C) A new phenomenon visible at Managua's major intersections is waves of vendors and beggars, many of them children, who

(D) Phenomenally new waves of vendors, beggars, and many children are visible at Managua's major intersections, which

(E) A wave of vendors and beggars, many of whom are children, are visible at Managua's major intersections, where they are a new phenomenon and


55). To meet the rapidly rising market demand for fish and seafood, suppliers are growing fish twice as fast as their natural growth rate, cutting their feed allotment by nearly half and raising them on special diets.

(A). their natural growth rate, cutting their feed allotment

(B). their natural growth rate, their feed allotment cut

(C). growing them naturally, cutting their feed allotment

(D). they grow naturally, cutting their feed allotment

(E). they grow naturally, with their feed allotment cut


Answers -

54). C is the best choice.

A,E - incorrect -- Subject-Verb Agreemant

B - incorrect -- phenomenon cannot rob cars.

D - incorrect -- very awkward , changes the meaning of the sentence

55). D is the correct answer - parallelism is maintained -"growing....cutting...raising...". Further antecedent of “they” is clear i.e “the fish”

C - incorrect -- after “as fast as” we need a clause.

A, B - incorrect -- wrong comparison -- cannot compare verb with noun --- growing fish (verb) with growth rate (noun).

B, E - incorrect -- violating parallelism.

Gmat Sentence Correction 52, 53

52). Byron possessed powers of observation that would have made him a great anthropologist and that makes his letters as a group the rival of the best novels of the time.

(A) makes his letters as a group the rival of

(B) makes his letters as a group one to rival

(C) makes his letters a group rivaling

(D) make his letters as a group the rival of

(E) make his letters a group which is the rival of

53). The expected rise in the price of oil could be a serious impact to industrialized nations and severely diminish the possibility to have an economy free of inflation.

(A) be a serious impact to industrialized nations and severely diminish the possibility to have

(B) seriously impact on industrialized nations and severely impede the possibility to have

(C) seriously impact on industrialized nations and severely impede the possibility of having

(D) have a serious impact on industrialized nations and severely impede the possibility to have

(E) have a serious impact on industrialized nations and severely diminish the possibility of having


Answers -

52). Correct answer - D

A,B,C - incorrect - subject verb agreement - powers....make

E - wordy

53). E is the best choice.

A,B,C - incorrect -- Always remember in GMAT --impact should remain a noun; a proposal can have an impact.(The only thing that can be impacted is a wisdom tooth).

D - incorrect - "possibility of" is correct idiom. Further "diminish" instead of "impede" is more appropriate to use here.

Gmat Sentence Correction 50, 51

50). In large doses, analgesics that work in the brain as antagonists to certain chemicals have caused psychological disturbances in patients, which may limit their potential to relieve severe pain.

(A) which may limit their potential to relieve

(B) which may limit their potential for relieving

(C) which may limit such analgesics’ potential to relieve

(D) an effect that may limit their potential to relieve

(E) an effect that may limit the potential of such analgesics for relieving


51). The man was always aware, sometimes proudly and sometimes resentfully, that he was a small-town Midwesterner who was thrust into a world that was dominated by wealthier, better-educated, and more polished people than him.

(A) who was thrust into a world that was dominated by wealthier, better-educated, and more polished people than him

(B) who had been thrust into a world that was dominated by more wealthy, educated, and polished people than him

(C) who had been thrust into a world dominated by wealthier, better-educated, and people more polished than he was

(D) thrust into a world dominated by more wealthy, educated, and polished people than him

(E) thrust into a world dominated by wealthier, better-educated, and more polished people than he


Answers -

50). E is the best choice

A,B,C - incorrect - use of "which" ambiguous - referring to 'patients' or 'analgesics' or..

D - incorrect - "their" -ambiguous - referring to 'patients' or 'analgesics' or effects of the analgesics...


51). E is the correct answer.

A,B,D- incorrect - Subject form of pronoun always comes after ‘than’ or ‘as’. (Pronoun errors)

C - incorrect - ".. than he was" - was needs to be ellipsed as I mentioned for Do - auxiliary verb in my GMAT Grammar blog.