【題目】I didn’t hear the phone. I ___ asleep.

A.must beB.must have been

C.should beD.should have been

【答案】B

【解析】

試題 考查情態(tài)動詞。句意:我沒有聽到電話,肯定是睡著了。根據(jù) I didn’t hear the phone可知是對過去的肯定推測,故用must have done,因此選B項。

考點 : 考查情態(tài)動詞

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