I. Complete the sentences with must (not) or (do not) have to (in the correct form). Sometimes it’s possible to use either; sometimes only have to is possible.
1. I have to go to the airport. I’m meeting someone.
2. It’s too late. I must/ have to go now.
3. You ________________________ lock the door when you go out. There have been a lot of break-ins recently.
4. Jack left before the end of the meeting. He ___________________ go home early.
5. I’ve already finished all my work, so I ___________________ study tonight.
6. Students ___________________ wear uniform when they go to school.
7. You really ___________________ hurry up, Vicky. We don’t want to be late.
8. I don’t want anyone to know. You ___________________ tell anyone.
9. When you come to London again, you ___________________ come and see us.
10. A person ___________________ become rich and famous in order to live a successful life.
11. Julia wears glasses. She ___________________ wear glasses since she was very young.
12. I ___________________ work late tomorrow. We are very busy at the office.
13. Johnny! You ___________________ play with sharp knives.
14. Caroline may ___________________ go away next week.
15. You really ___________________ work harder if you want to pass the examination.
16. I ___________________ go to the doctor. I’m feeling much better.
17. We couldn’t repair the car ourselves. We ___________________ take it to a garage.
18. You really ___________________ make less noise. I’m trying to concentrate.
19. Don’t make so much noise. We ___________________ wake the baby.
20. The food was free, so we ___________________ pay.
21. I think you ___________________ pay to park here. I’ll just go and read that notice.
22. Daniel ___________________ go to the bank. He hasn’t any money.
23. You ___________________ wash those glasses. They’re clean.
24. You ___________________ wear your best clothes. You’ll get them dirty.
25. I ___________________ put the heating on. I feel really cold.
