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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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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