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I didn't hear the phone. I asleep. A. must be B. must have been C. should be D.

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I didn't hear the phone. I asleep. A. must be B. must have been C. should be D.

I didn't hear the phone. I   asleep.

    A. mustbe   B. must have been C. should be D. should havebeen

 

试题答案

答案：B

解析：

B项表示“当时一定……”；D项表示“本应该……”。

 

标签：phoneasleepthedidnhear

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