---Listen! Helen is singing in the next room.

---It　　 be Helen. She has gone to Beijing.

A. can’t　 B. mustn’t　 C. may　 D. should

—Must I return the hook tomorrow morning?

—No, you _ .You can keep it longer.

A. mustn't　 B. can't 　　 C. needn't 　　D. couldn't

—Is this John’s T-shirt?

—It _____ be his. It`s much too small for him.

　　 A. needn’t　 B. shouldn’t　 C. can’t D. must

- Look, Sue is over there.

- That ____ be her. She is in Canada now.

　　A. mustn’t　 B. can’t　 C. needn’t　 D. won’t

— Who’s singing in the next room?

— It ____ be her . She has gone to New York.

　 A. can’t　　　　 　　 B. must　　　 　　 C. shouldn’t　　　 　 D. can