Question of the Day

Archaeologists in the Sudan have unearthed a bone of a mammal, one they assume to be of a genus rarely found on the continent of Africa.


CORRECT  (A) they assume to be of
 (B) they assume that is of
 (C) they assume that is
 (D) that they assume is
 (E) that they assume it to be
Identify
Idioms

The expression "assume to be" is an idiomatic trigger, and indicates that idioms are being tested.

Rules
Rule: Know Your Idioms!! Idioms are unique grammatical constructions that don't have a broader set of governing rules. They must be memorized.

The correct idiom is "assume...to be"

Click {{CONTENT_PAGE:72| here}} to review the list of common GMAT Idioms.


POE:
Since "assume...to be" is the correct idiom, eliminate all choices that use an incorrect alternative. This eliminates B, C, and D.

Compare Remaining Choices
Compare A to E.
E uses the pronoun "it," but A does not. "It" could either refer to "bone" or "mammal," since both are singular and gender neutral. Consequently, that pronoun is ambiguous and incorrect. Eliminate E.

Reread your choice:

Choose A.


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