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.