2. 外语
  3. If they______more aware of the trends, they could have avoided bankruptcy.

If they______more aware of the trends, they could have avoided bankruptcy.

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问题 If they______more aware of the trends, they could have avoided bankruptcy.
选项 A、were
B、are
C、have been
D、had been
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.
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