Living in the country side _____ fun, because the nature there is so beautiful.
A. can’t be               B. may be           C. must be

---Must I answer it in English?
---No, you _______. You can use Chinese.

—I think the man over there must be Bob.
—It ______ be him. He has gone to Paris.

You ______ to the meeting this afternoon if you have something important to do.

---Look!It _______ be Mr Zhang .
---No,it _______ be Mr Zhang. He has gone to Paris .

I’d rather ________ than _________

If I went to the moon, I ______ bring something unusual back to the earth.

—How much shall I pay for the telephone call?
—You  _____. It's free.

The red bicycle _____ be Lily’s. She has a blue bicycle.
A.  mustn’t    B. might not      C. can’t

－Must I go and get some water now?   －No, you __________.