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’tB．mustn’tC．shouldn’tD．needn’t
D
考察情态动词用法。Needn’t不必。根据上下文可知每天六点，火车都来到我家旁边，使用我不必使用闹钟。
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