1. Điền động từ khuyết thiếu ''mustn't'' hoặc ''don't have'' vào chỗ trống thích hợp.
1. There is a ''No turn right'' sign. You ...... turn right.
2. The sign says ''No smoking''. You ...... smoke here.
3. You ...... have an appointment for this doctor. You cam go and see him when you want.
4. You ...... tell me. I already know.
5. The big boss will be at the meeting. You ...... be late.
6. You can help me if you want to but you ......
7. You ...... park your car there. That's the Director's place.
8. This area is off limits to everybody. You ...... come here unless you are unvited.
9. You ...... to wear a tie in this company but they prefer it if you do.
10. You ...... criticize David. He's doing the best he can.
11. You ...... drive there. You can take the train.
12. You ...... play tennsis to enjoy watching tennis matches.
13. You ...... buy me presents though I always appreciate it when you do.
14. It's really important to remember. You ......forget.
15. You ...... tell anybody. It is a big secret.
16. We are already late. We ...... waste any more time.
17. This is a sterile area. It must be kept clean. You ...... bring any food or drink in here.
18. You ...... come at 8:00. Come at whatever time suits you.
19. You ...... smoke in this area. It is forbidden.
20. I ...... go back again. The treatment is finished.
21. eans are not allowed in this company. You ...... wear jeans.
22. You ...... be mad to work here but it helps !
23. You ...... buy the text book for this course, you can borrow mine.
24. You ...... smoke in a gas station.
25. This bus is free ! You ...... buy a ticket.
26. You ...... enter the park if your dog is not on a leash.
2. Điền ''mustn't hoặc needn't vào chỗ trống.
1. I ...... take the umbrella. It won't rain.
2. I ...... cross this bridge. It's closed.
3. We ...... be late. The train will leave in 10 minutes.
4. You ...... hungry. We have plenty of time.
5. You ...... smoke in here. It's forbidden. Look at that sign.
6. We have enough diesel, so we ...... sop here.
7. You ...... come if you don't want to.
8. They ...... do the washing up, they have a dishwasher.
9. You ...... show this e-mail to anyone else. I'll trust you.
10. The students ...... forget their home work.
