---There is somebody knocking at the door. Who________ it be?---I’m not sure. It ________ be a postman.
#75825
A
may; must
B
will; can
C
can; may
D
may; will
推荐题目
—Can you keep a secret?—You ________ worry—I'm not going to mention it to anyone.
#62328
A
needn't
B
couldn't
C
mustn't
D
won't
---Who’s the woman in red ? Is it Mrs. White?---It be her. She went to Beijing yesterday.
#75588
A
mustn’t
B
can’t
C
shouldn’t
D
must
The haze or smog was so serious that the winter running _________.Some students complained as they ran
#62272
A
could have cancelled
B
should have cancelled
C
must have been cancelled
D
ought to have been cancelled
The public transportation is very convenient in that big city, so there ________ be any difficulty in traveling around.
#62406
A
mustn't
B
wouldn't
C
shouldn't
D
needn't