I __________use a clock to wake me up because at six o'clock each morning the train comes by my house. 
#63362
A
couldn’t
B
mustn’t
C
shouldn’t
D
needn’t
推荐题目
—Why,I didn’t get you on the phone.—We ________football on the playground when you phoned.
#62277
A
must be playing
B
must play
C
must have played
D
must have been playing
Do you think the plan _________ out as soon as possible?
#63589
A
should carry
B
ought to be carried
C
ought to have carried
D
ought to have been carried