Giải hộ mik với IV. Supply the sentences with must or mustn’t 1. We __________ arrive on time. 2. We __________ pick flowers in the school garden. 3. We __________ wear uniform at school. 4. Cars __________ park in front of the entrance. 5. You __________ touch that switch. It’s dangerous. 6. We __________ be careful when we cross the road. 7. You __________ be quiet in the school library. 8. You __________ use a mobile phone in the cinema. 9. I __________ go home. It’s too late 10. You __________ see that film. It’s fantastic.