Bài 9: Điền động từ khuyết thiếu "mustn't" hoặc "don't have to"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 can 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 invited. 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 Jeans 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 mọi người giúp mik tick 5 sao

TRẢ LỜI:

1 There is a "No turn right" sign. You mustn't turn right.

2. The sign says "No smoking". You mustn't  smoke here.

3 You mustn't have an appointment for this doctor. You can go and see him when you want.

4 You don't have to tell me. I already know.

5 The big boss will be at the meeting. You mustn't be late.

6 You can help me if you want to but you don't have to.

7 You mustn't park your car there. That's the Director's place.

8 This area is off limits to everybody. You mustn't come here unless you are invited.

9 You mustn't to wear a tie in this company but they prefer it if you do.

10.You mustn't criticize David. He's doing the best he can.

11.You don't have to drive there.You can take the train.

12 You don't have to play tenniss to enjoy watching tennis matches.

13 You don't have to buy me presents though I always appreciate it when you do.

14 It's really important to remember you mustn't forget.

15.You mustn't tell anybody. It is a big secret.

16 We are already late. We mustn't waste any more time.

17 This is a sterile area. It must be kept clean. You don't have to bring any food or drink in here.

18 You don't have to come at 8.00. Come at whatever time suits you.

19 You mustn't smoke in this area. It is forbidden.

20 I don't have to go back again. The treatment is finished.

21 Jeans are not allowed in this company. You mustn't wear jeans.

22.You mustn't be mad to work here but it helps!

23 You don't have to  buy the text book for this course, you can borrow mine.

24 You mustn't smoke in a gas station.

25 This bus is free! You don't have to buy a ticket.

26 You mustn't enter the park if your dog is not on a leash.

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