1. He finished his exercise on time.
->his exercise was finished on time.
2. People plant rice in those fields.
->rice is planted in these fields.
3.They use cars and trucks to carry food to market.
->cars and truckss are used to carry food to the market.
4.This boy broke my window yesterday.
->my window was broken by this boy yesterday.
5. They have known him well.
->He has been known well.
6. We will meet him at the station.
->he will be met at the station.
7.Did you do your test perfectly?
->Was your test done perfectly ?
8. Why didn't you learn this lesson?
->Why wasn't this lesson learnt ?
9.How long have they done their work?
->How long has their work been done ?
10.No one could help him.
->He couldn't be helped.
