7. A house is being built, isn't it?
8. A lot of homework is being done by students.
9. Can the letter be torn by Mary?
10. Is this lesson understood?
11, Our children were looked after by her when we were out.
12. This room hasn't been used for ages.
13. The dog was hit in the garden by the boy yesterday.
30. It is time he is told what is wrong.
31. A ticket was given to the boy by Ann, and he was led to the theatre by her.
32. His house was broken into and a lot of things were stolen.
33. The children weren't looked after properly.
34. The light was switched and the door was opened.
35. Why wasn't me informed of the change of the plan?
36. Poems were being written at that time by Mary.
