EXERCISE 26. Lack of necessity (DO NOT HAVE TO) and prohibition (MUST NOT).

1. You …………..drive when you are tired. It's dangerous.

2. I live only a few blocks from my office. I …………drive to work.

3. Liz finally got a car, so now she usually drives to work. She ……….. take the bus.

4. Tommy, you ……………. say that word. It's not a nice word.

5. Mr. Moneybags is very rich. He ………… work for a living.

6. A: You …………. tell Jim about the surprise birthday party. Do you promise? B: I promise.

7. According to the rules of the game, one player ……….. hit or trip another player.

8. If you use a toll-free number, you ……….. pay for the phone call.

9. A: Did Professor Adams make an assignment? B: Yes, she assigned Chapters 4 and 6, but we ……… read Chapter 5.

10. A: Listen carefully, Annie. If a stranger offers you a ride, you ………. get in the car. Never get in a car with a stranger. Do you understand? B: Yes, Mom.

11. A: Children, your mother and I are going out this evening. I want you to be good. You must do everything the baby-sitter tells you to do. You ……….. go outside after dark. It's Saturday night, so you

………. go to bed at eight. You can stay up until eight-thirty. And remember: you …….. pull the cat's tail. Okay? B: Okay, Dad.