题目内容
(2012·全国卷Ⅰ)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 |
D
选D 考查情态动词。句意:我不需要用闹钟叫自己起床,因为每天早上六点都会有一列火车经过我家门口。应选“不需要”,即needn't。
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