问题

I saw your mother in the library just now.—It ______ be her. She went to Beijing yesterday.
A:can't
B:mustn't
C:needn't
D:must;
B:mustn't
C:needn't
D:must;
正确答案是:
同类题型
Here is an extra ticket for the art exhibition, whom would you rather __ with you,Mary or John?____
The teacher asked us ___________ so much noise.
Has Mr. Tom White arrived? — Yes, already. _____ he wait outside or just come in?
Pleasekeep me informed_______ the change of your address as soon as possible