In order to improve your spoken English, you ________ be afraid of losing face.

——Must we finish the exercise today?   ——No, you________.

—Excuse me. May I sit here? 
—I’m afraid you _________. My daughter will come back soon.

---Fifty dollars for such a T-shirt! You _______ be joking!
---I’m serious．It’s made of silk.

—Must I finish my homework now, Mom?
—No, you _______.You can do it tomorrow.
A.  can’t                    B.  needn’t                C.  mustn’t

— Is that girl in red Sally?
—No, it _________ her. She has gone to Hong Kong.
A. may be          B. must be         C. can't be

---Who’s the woman in red ? Is it Mrs. White?
---It          be her. She went to Beijing yesterday.

— It seems that Mr. Wu is standing there.
— It ______ be him because he called me from Canada just now.

The new law says that people_______ drive after drinking wine.

—Look! Is that Mr. Green?
—It          be Mr. Green. He has gone to Shanghai.