1 . You _________ think that what you do is meaningless, but I’m sure that you’ll thank yourself for doing it.

A．shall

B．should

C．may

D．must

2 . —Mum, Jerry asked me to watch the ball game after school. Can I go along?
—You _______, but be sure to get home before 10 o’clock.

A．should

B．would

C．must

D．may

3 . —Bicycle riding is often safe.
—Yes, but you ________ have an accident if you ride too fast.

A．must

B．should

C．may

4 . —Is it important to protect wild animals, Susan?
—Yes. If we don’t protect them, they _________ die out one day.

A．may

B．must

C．have to

5 . Bicycle riding is often safe. But if you ride too fast, you ________ have an accident.

A．must

B．should

C．may

6 . —________ I borrow your MP3?     
—Sure. Here you are.

A．May

B．Should

C．Must

D．Would

7 . —It’s wonderful that Lily has been invited to the welcome party too!
—I’m afraid she ________ not come. She has been busy with her study recently.

A．must

B．can

C．may

D．should

8 . —What do you want to do in the future, Mingming?
—I’m not sure. I ________ teach Chinese in a primary school.

A．must

B．may

C．need

9 . —Where is your elder brother, Sandy?
—He ________ be in the library, but I’m unsure. You can call him.

A．may

B．must

C．needn’t

D．shouldn’t

10 . —Jim, Mother’s Day is coming. What present will you give your mother?
—I haven’t decided yet. I ________ make her a birthday cake by myself.

A．must

B．would

C．should

D．may