1. Martin was waiting while his room .................... .

2. The book .................... in 1989.

3. .................... by the river last year?

4. We were preparing something to eat while the tables .................... .

5. While the swamp .................... by the workers, the grass was being cut by my neighbour.

6. When .................... ? - Two months ago.

7. The street .................... an hour ago.

8. When .................... president of the USA?

9. Mark was sitting while his shirt .................... by his mother.

10. Tom .................... by his teacher for not doing the homework yesterday.