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.