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 |
相关知识点
推荐套卷
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 |