Underline the correct answer----- Nội dung ảnh ----- III. Underline the correct answer. 1. Please be quiet! This is a library. You must/ mustn't/ don't have to talk loudly. 2. Drivers must/ mustn't/ don't have to stop their cars when the traffic lights turn red. 3. I must/ mustn't/ don't have to ride a bike to school. I can walk there in just ten minutes. 4. I have an extremely important test tomorrow. I have to/ has to/ must study hard for it. 5. We must/ mustn't/ don't have to use mobile phones or make lots of noise in the cinema. 6. When you’re in Australia and New Zealand, you must/ don't have to/ has to drive on the left side of the road. 7. Griffin mustn't/ don't have to/ doesn't have to take a train to Ha Noi. He can take a plane instead. 8. Ms. Beatrice's doctor says that she doesn't have to/ have to/ has to exercise regularly to stay healthy. 9. We have to/ don't have to/ must get up early on Sundays. We don't have classes on Sundays. 10. There is a ‘No Eating or Drinking’ sign by the door. They have to/ don't have to/ mustn't eat or drink here. |