1. As students, you _______ show your respect to your teachers.
A. must B. shouldn’t C. mustn't D. ought
2. I think you _______ eat less chocolate if you want to lose weight.
A. should B. shouldn’t C. mustn’t D. can
3. The windows look clean. You _______ wash them.
A. must B. mustn't C. don't have to D. ought to
4. You _______ throw litter on the streets.
A. mustn't B. have to C. must D. don’t have to
5. We have plenty of time for doing the work. We _______ be hurried.
A. don’t have to B. should C. mustn't D. ought to
6. Tell her that she _______ be here by six. I insist on it.
A. shouldn’t B. must C. ought to D. don’t have to
7. It’s a school rule. All the students _______ wear a uniform.
A. have to B. ought to C. don’t have to D. oughtn’t to
8. We _______ put the fish in the fridge before it spoils.
A. mustn’t B. don’t have to C. oughtn’t to D. ought to
9. You _______ do it now, and do not argue.
A. must B. ought C. mustn’t D. shouldn’t
10. You _______ forget the keys or you can’t get in.
A. must B. mustn’t C. have to D. don’t have to
11. He has made so many mistakes in his essay that he ______ do it all again.
A. can B. cannot C. doesn’t have to D. has to
12. It is a top secret. You _______ tell anyone about it.
A. mustn't B. don’t have to C. mightn't D. mayn’t
13. You don't look well. You _______ see a doctor.
A. shouldn’t B. should C. mustn’t D. can’t
14. You _______ touch that switch, whatever you do.
A. must B. mustn't C. may D. have to
15. You _______ type my essay again. It’s not necessary.
A. have to B. don’t have to C. must D. mustn’t
