Must/ Mustn’t

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

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

3. This is important. You ____ listen carefully.

4. There is an intersection ahead. We ________ go fast.

5. You _____ touch the snakes.

6. You _____ drop litter.

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

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

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

10. You ______ tell us about any problems.