1. The wine should be opened 3 hours before it is used.

2. Nails mustn't be hammered into the walls without permission.

3. Bicycles must not be left in the hall.

4. Books can be kept by members for three weeks.

5. Their complaints should be sent to the main office.

6. All the switches must be turned off before you leave the room.

7. An appointment must be made in advance.

8. The car might be stolen.

9. The room must be kept tidy.

10. The problem can't be solved by them.

11. The picture can't be restored by us.

12 - 15 chưa bt làm

Học tốt :)

fromphuongthao

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1. The wine should be opened about three hours before it is used.
2. Nails must not be hammered into the walls without permission.
3. Bicycles must not be left in the hall.
4. Books can kept for three weeks by members.
5. Their complaints should be sent to the main office.
6. All the switches must be turned off before leaving the room.
7. An appointment must be made in advance.
8. The car might be stolen.
9. The room must be kept tidy.
10. The problem can't be solved.
11. The problem can't be solved.
12. He can never be found at home.
13. Their table must be taken into the room by the pupils.
14. My new cars can't be repaired in the garage.
15. Their homework must be finished before they go to bed.