1 . —Mum, where is my key?

—I’m not sure. It ________ be on the table.

A．must

B．mustn’t

C．couldn’t

D．might

2 . —Where is Lily?
—She ________ go to the teachers’ office. I’m not sure.

A．might

B．should

C．will

D．must

3 . You ________ walk on the wet hill path because you ________ fall and hurt yourself.

A．must; might be

B．mustn’t; might

C．needn’t; need

4 . —Where is Jane? She didn’t answer my call.
—I have no idea. Try her home number. She ________ be there.

A．must

B．would

C．might

5 . —Is the young man in a white T-shirt our new math teacher?   
—He ________ be. I’m not sure.

A．must

B．can’t

C．might

D．should

6 . —Where is Li Ping?
—I am not sure where she is. She ________ be in Nanning.

A．can

B．might

C．must

7 . —What do you want to do this weekend?   
—I ________ stay at home. But I am not sure.

A．must

B．might

C．should

8 . —Eric, I wonder if I ________ use your telephone.
—Of course. Here it is.

A．might

B．need

C．must

D．should

9 . —Listen! Is Tim talking on the phone in the hallway?
—It ________ be him. But I’m not sure.

A．can

B．must

C．might

10 . —Whose is this pink notebook?              
—I think it ________ be Linda’s, but I’m not sure.

A．might

B．must

C．would

D．need