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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1804

I ________ asleep because it took me a long time to realize that the telephone was ringing.                                    

A.could fall B.need have fallen C.must have fallen   D.may fall
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Iasleepbecauseittookmealongtim