--- May I smoke here? --- If you , choose a seat in the smoking section.
#63523
A
should
B
could
C
must
D
may
推荐题目
－Shall we go hiking this Sunday? －Sorry, I _______. I’ll have to take a piano lesson.
#74286
A
may not
B
can’t
C
needn’t
D
mustn’t
According to the rules and regulations, all payments _____ be made in cash in the shopping center.
#63190
A
shall
B
can
C
must
D
should
I was really anxious about you. You _______ home without a word．
#63535
A
mustn’t leave
B
shouldn’t have left
C
couldn’t have left
D
needn’t leave
–Can you swim? --___________, but my brother Tom can.
#74545
A
Yes, I can.
B
No, I can’t.
C
Yes, I do.
D
No, I don’t.