—May I smoke here，please?—I am afraid you ．This is a non-smoking area．
#77581
A
can
B
can’t
C
may
D
may not
推荐题目
Keep up a good state of mind even if you _____ fail plenty of times.
#62540
A
must
B
will
C
can
D
should
I told Sally how to get here, but perhaps I ______for her.
#62233
A
had to write it out
B
must have written it out
C
should have written it out
D
ought to write it out
The World Wide Web is sometimes jokingly called the World Wide Wait because it ______ be very slow.
#62939
A
should
B
must
C
would
D
can
Susan’s parents have bought a large house with a swimming pool.It be very expensive.
#76457
A
must
B
can
C
mustn’t
D
can’t