EXERCISE 3: BỊ ĐỘNG VỚI NHỮNG ĐỘNG TỪ KHUYẾT THIẾU.
1. You should open the wine about three hours before you use it.
2. You must not hammer nails into the walls without permission.
3. People must not leave bicycles in the hall.
4. Members can keep books for three weeks.
5. People should send their complaints to the main office.
6. You must turn off all the switches before leaving the room.
7. You must make an appointment in advance.
8. Someone might steal the car
9. you must keep the room tidy.
10. They can't solve the problem.
11. We can't restore the picture.