—May I smoke here?    —If you _____, choose a seat in the smoking section.
#62987
A
should
B
could
C
may
D
must
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She ______have stopped her work halfway.
#63021
A
ought to not
B
ought not to
C
not ought to
D
does not ought to
You _ to the meeting this afternoon if you have something important to do.
#76786
A
needn’t to come
B
don’t need come
C
don’t need coming
D
needn’t come