—Another cup of coffee?

—No, thanks. I _____ be off. Mary is waiting for me.

A．can B．may

C．must D．might

—I’m a little tired. Let’s go to the zoo by taxi.

—We take a taxi. It’s not far from here.

A．can’t B．mustn’t

C．couldn’t D．needn’t

—Susan has bought a large house with a swimming pool.

—It ______ be very expensive. I never even dream about it.

A．must B．might

C．can’t D．shouldn’t

—Listen! Is Professor Johnson giving a report in the hall?

—No, it be him. He has gone to Japan.

A．needn’t B．may not

C．mustn’t D．can’t

—Can you play the piano?

—Yes, I _______. I often practice it on weekends.

A．needn’t B．need

C．can’t D．can

—May I watch TV for a while？

—No, you _______. You have to finish your homework first.

A．shouldn’t B．needn’t

C．mustn’t D．won’t

—______ you swim?

—Yes, but I’m not a good swimmer.

A．Can B．May

C．Need D．Must

—Excuse me, where are we going to have our class meeting?

—I’m not sure. Ask our monitor, please. He know.

A．can B．may

C．need D．shall

We hope that as many people as possible ________ join us for the charity show tomorrow.

A．need B．can

C．must D．should

—Let’s go to the concert tonight, Michael!

—Sorry, I _______. I have to help my mother with the housework

A．mustn’t B．may not

C．needn’t D．can’t