It __be the vocabulary that caused you the problem in the exercise because you know a lot of words.
#62775
A
may
B
couldn’t
C
should
D
needn’t
推荐题目
—Must I make a phone call to him now?  —No, you________. You ______ write an email.
#76090
A
mustn’t; may
B
may not; must
C
shouldn’t; must
D
don’t have to; may
The haze or smog was so serious that the winter running _________.Some students complained as they ran
#62272
A
could have cancelled
B
should have cancelled
C
must have been cancelled
D
ought to have been cancelled