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I/
1. He hasn't been seen by me for three years.
2. Mrs.Green had the cat fed by Mary.
3. The teacher is going to have the floor cleaned by Tom.
4. A story is going to be told by the teacher.
5. The cake is being cut with a sharp knife by Mary.
6. He can never be found at home for he is always on the move.
7. Human life has completely been changed by Science and Technology.
8. Mr.Cole used to be visited by John at weekends.
9. The house was painted last week.
10. A new motorway is being built.
11. The news was being watched on TV at 8:00 last night.
II/
1. He told me that he had something to show me then.
2. She said that she was leaving there for Hue the following day.
3. The father said to us that he had to go then.
4. Tom told me that he lived in the city.
5. Ba told me that they were doing their homework.
6. Hoa told me that she was a teacher.
7. They said that they were unlucky that day.
8. She told me that she wanted to speak to my father.
9. Tuan asked Mai which class she was in.
10. Ba asked Nam if he could speak English.
11. Mary asked me if I would go with her.
12. I asked him what my name was.
13. Mr.Brown asked Tom where he lived.
14. Mrs.Nga asked me how long I had studied English.
15. Tuan asked Mai which class she was in.