题目内容
I ________ use a clock to wake me up because at six o'clock each morning the train comes by my house.
[ ]
A.couldn't
B.mustn't
C.shouldn't
D.needn't
答案:D
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题目内容
I ________ use a clock to wake me up because at six o'clock each morning the train comes by my house.
A.couldn't
B.mustn't
C.shouldn't
D.needn't