Thank you very much Vercules. I understand that the "it" usages you mentioned are right. But in the GMAT, can we use it to refer to an undefined subject. I am studying in Kaplan
and they say that the subject referred to should always be there and the pronoun should clearly point to it.
Hi score780,As this is a standard English usage, GMAT may give a sentence with containing "it" used as explained above. In other cases, in which "it" is used as a pronoun, "it" must have an antecedent which agrees with "it" number/ gender.
Note that ambiguity in pronoun can be tolerated in GMAT SC if there are other choices are containing grammatical errors. Pronoun ambiguity are guidelines or suggestions, only eliminate an answer choice based on pronoun ambiguity after you have considered other grammatical errors. Consider the following GMATPrep question as an example:
During the same period in which the Maya were developing a hieroglyphic system of writing, the Aztec people also developed a written language, but it was not as highly sophisticated as that of the Maya and was
more pictographic in nature.
A. but it was not as highly sophisticated as that of the Maya and was
B. but it was not as highly sophisticated ad the Maya, being
C. but, not as highly sophisticated as the Maya's, was
D. not as highly sophisticated as that of the Maya, however, being
E. not as highly sophisticated as the Maya's however, it wasIn the OA "it" and "that" refer to "written language", but one can think that they may also refer to "hieroglyphic system of writing". Such ambiguity is tolerated.
Hope this helps,
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