broall wrote:
During the infant’s first physical exam last week, the parents were surprised to learn that his blood type was O negative, as their blood types are each B positive.
A. was
B. had been
C. has been
D. is
E. was being
VERITAS PREP OFFICIAL SOLUTION:
With only one word underlined in this problem, the decision point is obvious: tense. In (A) and (E) you have two versions of the past tense (simple past and past continuous); in (B), you have the past perfect tense and in (C) the present perfect
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