1. must
2. have to
3. have to
4. have to
5. has to

1. Vietnamese children _____have to_____ wear uniform when they go to school.

2. Last night my sister was ill . We _____ must_____ call the doctor.

3. I have bad toothache . I _____must_____ make an appointment with the dentist.

4. I don't want to _______have to_____ wait in a queue for ages.

5. She _______has to______ work on Saturday morning.

6. When you come to California, you ______must______ come and see us soon.

7. This is a terrible party . We ______must_____ go home.

8. If there are no taxis we'll _______have to_____ walk.

9. Daniel ______must_____ go to the bank . He hasn't any money.

10. You really ______have to_____ hurry up , Vicky . We don't want to be late.

XII – Fill in the blanks with mustn't or don't / doesn't have to:

1. They...don't have to.....work on Sunday.

2. Visitors....don't have to......feed the animal.

3. Tim....mustn't ...wear uniform at school.

4. You ...don't have to... touch that switch. It’s very dangerous.

5. Don't make so much noise. We.....mustn't ....wake the baby.

6. Staff....mustn't ...smoke when serving customers.

7. There is a lift in the building, so I...mustn't ......climb the stairs.

8. Sally is extremly rich. She....doesn't have to......work.

9. I don't want anybody to know our plan. You......mustn't ......tell anymore.

10. You..mustn't .......be a good player to enjoy a game of tennis