Must/ Mustn’t

1. The cars go very fats. We _____ be careful.

2. You _____ drop litter.

3. You _____ touch the snakes.

4. The traffic lights are red. You ____ stop.

5. This is important. You ____ listen carefully.

6. Our roads are dangerous places. We ______ have discipline.

7. This sign says “Stop”. We _____ go straight on.

8. You ______ tell us about any problems.

9. You ______ use your mobile phone in the exam room.

10. You ______ drive you car carefully.