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---Wakeup,Peter.Timetorise.---I     asleepwhileIwasread...

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问题详情:

---Wakeup,Peter.Timetorise.---I     asleepwhileIwasread...

---Wake up,Peter.Time to rise.

---I      asleep while I was reading.

A.must fall                           B.could fall

C.should have fallen                  D.must have fallen

【回答】

D

知识点:情态动词

题型:选择题