–Will the new iphone cost a lot? --I ______ think so. Apple’s products are usually expensive.
A. shouldn’t B. needn’t C. would D. must
— Mom, must I finish my homework now?
— No, you ______. You may have supper first.
A. mustn’t B. needn’t C. can’t
—Must I learn all these words by heart?
—No, you ______. It’ll be fine if you copy them in your exercise books.
A. needn’t B. can’t C. shouldn’t D. mustn’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
– Must I get up early tomorrow morning?
– No, _________.
A. you mustn’t B. I don’t think you have to
C. you can’t D. you need
（2011枣庄）You________wear sports shoes when you climb a mountain．
A. can’t
B. shouldn’t
C. mustn’t
D. have to
