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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
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I ________ use a clock to wake me up because at six o'clock each morning the train comes by my house.(2012·新课标全国)

A.couldn't B.mustn't C.shouldn't D.needn't
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Iuseaclocktowakemeupbecauseats