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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.
A.mustn’tB.needn’tC.shouldn’tD.couldn’t
B

试题分析:句意:我不必使用钟来叫醒我,因为每天早上6点火车从我家旁边经过。四个选项的含义分别是:A. mustn’t 禁止,B. needn’t 不必,C. shouldn’t不应该,D. couldn’t不能,所以选B。
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