－Mike, I can’t stop playing computer games.
－For your eyes, I am afraid you ______.

—Whose schoolbag is this?
—It ___________ be Mary’s. It has her name on it.

You _____ lose your way if you walk alone in the mountains at night.

—Miss Li, must we hand in our homework right now?
—No, you ____.You can hand it in tomorrow.

It rained heavily, so we _______ stay at home watching TV or surfing the Internet all day.
A. could     B. had to      C. must

The magazine___________ be Lily's, for we can find her name on the cover.

—Be quiet, Mr Smith is coming.
—Don’t worry. It ＿＿＿ be him. Mr Smith is much taller.
A.  mustn’t      B.    must   C.     can’t

－Dad, may I watch TV?
－No, you can’t. You _______ finish your homework first.
A. must     B. can      C. may  

There are no customers in the hotel. It ______ have the friendliest service.

—Must I finish my homework today,Ms Liu?
—No,_______.
A.you mustn’t       B.you don’t have to      C.you can’t