Gmat Sentence Correction 36, 37

36). In contrast to large steel plants that take iron ore through all the steps needed to produce several different kinds of steel, processing steel scrap into a specialized group of products has enabled small mills to put capital into new technology and remain economically viable.

(A) processing steel scrap into a specialized group of products has enabled small mills to put capital into new technology and remain

(B) processing steel scrap into a specialized group of products has enabled small mills to put capital into new technology, remaining

(C) the processing of steel scrap into a specialized group of products has enabled small mills to put capital into new technology, remaining

(D) small mills, by processing steel scrap into a specialized group of products, have been able to put capital into new technology and remain

(E) small mills, by processing steel scrap into a specialized group of products, have been able to put capital into new technology and remained


37). Any medical test will sometimes fail to detect a condition when it is present and indicate that there is one when it is not.

(A) a condition when it is present and indicate that there is one

(B) when a condition is present and indicate that there is one

(C) a condition when it is present and indicate that it is present

(D) when a condition is present and indicate its presence

(E) the presence of a condition when it is there and indicate its presence

Answers -

36). D is the correct answer -- uses parallel verb forms to complete the construction "have been able to put... and remain". The logical comparison here is between large steel plants and small mills.

A, B,C -- incorrect -- illogically contrast large steel plants with [the] processing [of] steel scrap. Further, in choices B and C remaining is
not parallel with put; consequently, it is not clear exactly what is remaining economically viable.

E -- incorrect -- remained is not parallel with put.


37). Correct choice is C -- produces a sentence in which pronoun "it" refers clearly and logically to the noun "condition".

A, B -- incorrect -- the phrase "indicate that there . is one" does not grammatically fit with "when it is not" because it has no referent.

B, D -- incorrect -- are imprecise in saying that a test will fail to detect
when a condition is present, since the issue is the presence and not the timing of the condition. Further, "its" presence in D leaves the "it" in "when it is not" without a logical referent: it must refer to condition, not presence.

E -- incorrect -- repeats the error stated above ; also, "the presence ... when it is there" is imprecise and redundant.