—Listen! Is Mary singing in the next room?—No. It _______ be Mary．She has gone to Shanghai for an important meeting.
#74311
A
can’t
B
may not
C
mustn’t
D
needn’t
推荐题目
Students ________ remain in their seats until all the papers have been collected.
#62519
A
shall
B
might
C
could
D
will
---Can you drive a car? --- No, I ________. I’m not old enough to get a license.
#76412
A
needn’t
B
may not
C
can’t
D
mustn’t
—____ I swim here?—I’m sorry. Children ____ swim alone here..
#74302
A
Must, can’t
B
May, must
C
Can, mustn’t
D
Can’t, can