---Look at the boy running on the playground. Is it David? ---It ______ be him.

题型：不详难度：来源：

---Look at the boy running on the playground. Is it David?
---It ______ be him. I saw him go to the teachers’ office just now.

A．mustn’t

B．can’t

C．couldn’t

D．must

答案

解析

根据后文的内容，可知为否定的选择为B

举一反三

----Listen! Is Kitty in the next room?
---- No, it ______ be Kitty. She has gone to Beijing.

A．may not

B．can’t

C．mustn’t

D．needn’t

题型：不详难度：| 查看答案

That man ________ be Mary’s father, as he is much taller.

A． can

B．must

C． can’t

D． mustn’t

题型：不详难度：| 查看答案

He ________be at home because the light in his room is on.

A．must

B．can’t

C．can

D．mustn’t

题型：不详难度：| 查看答案

A: Listen! Is it Linda singing in the next room?
B: No, it __________ be her. She is still in Shanghai.

A．can’t

B．couldn’t

C．may not

D．might not

题型：不详难度：| 查看答案

—I want to know if I _______________smoke here.
—No, you ______________. Could you see the sign “ No Smoking” there?

A．can; needn’t	B．must; can’t
C．shall; won’t	D．can; mustn’t

题型：不详难度：| 查看答案