l. The rule was explained to the students by the teacher.
2. He is often laughed at by them.
3. He was being listened to by nobody.
4. The successful performance of the young actress will be talked much about by people.
5. You can't watch the film now. The film cannot be watched now by you. The TV set is being fixed by the mechanic.
6. All the advertisements were looked through very attentively by us.
7. The house has been repaired lately by John.
8. All the business letters will have been answered by noon by me.
9. Is the floor being washed by her? No, she has already washed it.
10 The birthdays have been celebrated recently by my schoolmates.
