If they ______ more aware of the trends they could have avoided bankruptcy.A.wereB.areC.h
公共英语
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If they ______ more aware of the trends, they could have avoided bankruptcy.
A.were
B.are
C.have been
D.had been
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正确答案:D
解析:Had been is the correct past perfect verb for a past unreal condition in an if clause. Choice (A) is the past tense. Choice (B) is the simple present. Choice (C) is the present perfect.
