Put the verb into the correct form, present simple or past simple, active or passive.
1.It's a big factory. Five hundred people .................(employ) there.
2.Water.................(cover) most of the Earth's surface.
3.Most of the Earth's surface...............(cover) by water.
4.The park gates................(lock) at 6.30 p.m. every evening.
5.The latter.................(post) a week ago and it................(arrive) yesterday.
6.The boat................(sink) quickly but fortunately everybody.................(rescue).
7.Ron's parents..............(die) when he was very young. He and his sister................(bring) up by their grandparents.
8.I was born in London but I...............(grow) up in the north of England.
9.While I was on holiday, my camera................(steal) from my hotel room.
10.While I was on holiday, my camera...................(Disappear) from my hotel room.
11. Why................(Sue/resign) from her job? Didn't she enjoy it?
12.Why................(Bill/sank) from his job? What did he do wrong?
13.The company is not independent. It.................(own) by a mush larger company.
14.I saw an accident last night. Somebody..................(call) an ambulance but nobody..................(injure) so the ambulance..................(not/need).
15.Where..............(these photographs/take)? In London? .................(you/take) them?
И нужно объяснить, почему поставили в такой форме.
Пожалуйста!!!

1. are employed2. covers3. is covered4. get locked5. was posted/ arrived6. sank/ was rescued7. died/ were brought up8. grew9. was stolen10. disappeared11.Why did Sue resign from her job?12. Why was Bill sacked from his job13. is owned14. called/ was injured/ was not needed15. where were these photographs taken? Did you take them?Когда действие совершено подлежащим (вода покрывает), то active voice.  А когда действие совершается НАД самим подлежащим (земля покрыта водой), то passive voice