－Look, your sister is playing the piano over there.－She ______ be my sister. She has gone to America.
#77768
A
mustn’t
B
can’t
C
shouldn’t
D
may not
推荐题目
--- There is someone at the door. Who ______ it be? Is it the postman?--- No, it ________ be him. It’s just seven o’clock. It’s too early.
#75704
A
may, can’t
B
will, won’t
C
may, mustn’t
D
must, may not
--Can I play computer now? --No, you ______. You _____do your homework first.
#76207
A
can; can
B
can’t; must
C
can’t; can
D
must; can
(2013·湖南高考)He ________ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.
#62396
A
wouldn't
B
shouldn't
C
couldn't
D
mustn't
The doctors are doing all that they _____, but the old man is still not breathing properly.
#62988
A
shall
B
need
C
may
D
can