It be the vocabulary that caused you the problem in the exercise because you know a lot of words.
#62951
A
may
B
couldn’t
C
should
D
needn’t
推荐题目
------It took me about 40 minutes to ride here.------Have a drink ,please. You ________ be thirsty.
#74832
A
will
B
should
C
must
D
might
---Fifty dollars for such a T-shirt！You_____ be joking！--- I’m serious. It’s made of silk.
#62989
A
must
B
need
C
may
D
can
— Must I do the rest of the work today?— No, you _________ finish it tomorrow.
#75861
A
must
B
can
C
needn’t
D
can’t
A: May I go out to play football, Dad?B: No, you ________. You must finish your homework first.
#74877
A
may not
B
needn’t
C
shouldn’t
D
mustn’t
-Must I send my uncle an e-mail now, Dad? -No, you ____.You____ do that after you finish your homework.
#74402
A
couldn’t; may
B
can’t; can
C
needn’t; can
D
may not; must