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【题目】Sorry, I'm late. I________have turned off the alarm clock and gone back to sleep again.

A.should

B.might

C.can

D.will

【答案】B

【解析】I'm late.暗示说话者可能是关掉闹钟又睡着了,故应用might have done sth.表示“过去可能做过某事”。

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