1 . —Would you like to visit Hainan University tomorrow?
—Sorry, I’m afraid I ________. I’ll work as a volunteer in my community.

A．can

B．can’t

C．must

2 . —Listen! Is that Kate playing the violin in the room?
—No. It ________ be her. She has gone to Sanya.

A．can’t

B．mustn’t

C．needn’t

3 . —Ruby, when did your father go out?
—I’m not sure, but he ______ go too far. His tea is still hot.

A．can’t

B．must

C．might

4 . —Tina, is that our math teacher Mr. Wang?
—It ________ be Mr. Wang. He has gone to Beijing.

A．must

B．mustn’t

C．can’t

D．can

5 . I c________ remember the moment that my English teacher encouraged me when I was young.

6 . 骆驼没有水能生活很长时间。（without）（汉译英）
_____________________________

7 . Modern medicine is developing quickly and now most eye problems _________ be cured.

A．can

B．must

C．should

D．need

8 . —Did you see my pen? I left it on the table yesterday.
—Oh, it ________ be there. I used it and put it next to the phone.

A．needn’t

B．mustn’t

C．can’t

9 . —Listen! David is talking happily with his mother in the next room.
—It ________ be his mother. She has gone to Yunnan to be a volunteer doctor.

A．needn’t

B．mustn’t

C．may not

D．can’t

10 . —You ________ swim here. Look at this sign, “No swimming”.
—Sorry, I won’t. Thanks for reminding me.

A．needn’t

B．wouldn’t

C．can’t