I.

1. This room is used by us only on special occasions.

2. In some districts pigs are used by farmers to find turtles.

3. These artificial flowers of silk are made by them.

4. The seals are fed by them at the zoo twice a day.

5. These dams are made by beavers.

6. His car is washed by Carl every Saturday.

7. Tennis is played by us twice a week.

8. A nest is made by this bird.

9. A national anthem is sung by a famous singer at the beginning of the game.

10. The snow is shuffled by them every winter.

11. At least two books are read by Mark every week.

12. His little sister is taken care of by him.

13. The phone is answered by Margaret at the company.

14. Hundreds of books are published by them every year.

15. Millions of tons of potato are produced by them each year.

16. Over 80% of goods are transported by the ships.

17. 71% of the planet is covered by water.

18. Cars is repaired by mechanics.

19. The best cake in the world is made by that baker.

20. Her daughter is taken by her to school.