— 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
—Will you stay for some more days?
—Sorry, I_____. My mother called to ask me to go back at once.
A. mustn’t B. may not C. can’t D. wouldn’t
The students ought to wear school uniforms when they’re at school.
A. are supposed to B. are allowed to C. would like to D. love to
—Mr Smith must have been to your home this morning．
—No, he ______, because he didn’t know my address．
A. couldn’t B. can C. mustn’t D. may not
