练习

　1. Mike, you__1__play with fire. You__1__ burn yourself.
　　A. won’t; can’t
　　B. mustn’t; may
　　C. don’t have to; must
　　D. have got to; shouldn’t
　　
2. You__2__see the doctor, Joe. You don’t look very well.
　　A. must
　　B. shall
　　C. may
　　D. can
　　
3. —Must I clean the window now?
　　—No, you__3__
　　A. mustn’t
　　B. needn’t
　　C. can’t
　　D. may not
　　
4. Jack’s ill, so they__4__change their plans.
　　A. must
　　B. should
　　C. have got to
　　D. ought to
　　
5. Harry has been reading all day —he__5__be tired.
　　A. should
　　B. has got to
　　C. has to
　　D. must
　　　　

答案及详解

Key 1: 1-5 BABCD