Ex 13. Circle A. B. C or D to indicate the words/ phrases that need correction
1. You (A) have to (B) made sure that children (C) don't play outside alone.
2. You (A) mustn't (B) uses the motorbike without a driver's license. It's (C) against the law.
3. Drivers (A) haven't (B) to stop at (C) yellow traffic lights.
4. You (A) ought (B) to taking him (C) to the emergency room.
5. During the lesson, (A) does you (B) have (C) to listen to your teacher carefully and take notes quickly.
6. Students (A) don't have to (B) consume (C) food or drink in the class or in the library.
7. Get out of the grass! (A) You (B) must walk on the grass (C) here.
8. The baby (A) is sleeping. (B) You (C) don't have to shout.
9. Lien, we (A) must (B) are (C) quicker or we will miss the last train to Hai Phong city.
10. You (A) have to (B) feed the dog. (C) I've already fed it.