Поставьте глаголы, данные в скобках в правильную форму present simple или past simple,активный или пассивный залог.

1. It's a big factory. Five hundred people (employ) there.

2. (somebody / clean) this room yesterday?

3. Water (cover) most of the earth’s surface.

4. How much of the earth's surface (cover) by water?

5. The park gates (lock) at 6.30 p.m. every evening.

6. The letter (post) a week ago and it (arrive) yesterday.

7. The boat hit a rock and (sink) quickly. Fortunately everybody (rescue).

8. Richard's parents (die) when he was very young. He and his sister (bring up) by their grandparents.