1. People's complaints should be sent to the main office.
2. Your car might be stolen if you had left the keys in it.
3. The fire could be caused by a short circuit.
4. Lan's friends are going to be invited to her birthday party.
5. The door of the classroom couldn't be opened by Lien
6. News should be announced as soon as possible.
7. The scientific book has to be returned to the library by Phong.
8. That old building must be repaired.
9. The memorial monument will be rebuild by the government.
10. Phong may be elected as their leader by the students.
11. Papers written in pencils won't be accepted by the teacher.
12. Some interesting places might be visited by the athletes after Sea-Games.
13. Lan's parent's house has to be cleaned up before Tet holidays
14. She might be interviewed by the principal.
15. Fruit must be kept in the fridge for long.
