=>
III/
1. on/ of
2. from/in
3. for/to
4. in/of
5. for
6. of
7. on

IV/
2. Ba wish he spoke English fluently.
3. This room is cleaned by the students every day.
4. A new bridge has just been built here by the workers.
5. That schoolbag was bought by me last year.
6. Ba's work has been finished before lunch.
7. We have not met each other for five years.
8. He's done that job for 5 years.
9. An English test will be done next week.
10. His son is going to be given a present by him.
11. Lan said that her father worked in that company.
12. Tuan asked Minh if he liked pop music.
13. Nga asked Mai what she would do the following day.
14. The exercises must be done carefully.