It             be the vocabulary that caused you the problem in the exercise because you know a lot of words.
#62254
A
couldn’t
B
may
C
should
D
needn’t
推荐题目
Sometimes we have much homework to do, but not often. Anyway, it ______in time.
#76665
A
can finish
B
should finish
C
can be finished
D
should be finished
I _____ have watched that movie --- it’ll give me horrible dreams.
#63539
A
couldn’t
B
needn’t
C
shouldn’t
D
mustn’t