`III`

1. That novel was written by Mrs. Allen in 1998.

2. Our desk were repaired during the weekend. 

3. The reference book from the shelf was borrowed by Nam yesterday.

4, The letter was left on the desk by him some minutes ago.

5. A new bike was bought for me by my mother last month.

6. Our written test was returned by our form teacher to us last lesson.

7. Paper was invented by the chinese in the century A.D.

8. Trees were planted in their neighborhood by Vietnamese a year ago.

9. Games were play by the children yesterday.

10. The housework was done by my sister yesterday

`II`

1. The letters are delivered by Mr Hai every day

2. The tickets are often bought by the children at the box office 

3. Their homework is usually finished before bed time 

4. Our execises are corrected by the teacher today 

5. The shows of music on TV are often watched 

6. A written test is done today 

7. The Picasso's exhibition is always seen

8. The streets are cleane by the workers everyday 

9. Many accidents are caused by careless driving 

10. The river bank is covered by weeds