1. Columbus discovered America.
America was discovered by Columbus.
2. We keep money in a safe.
Our money is kept in a safe.
3. A bee stung her.
She was strung by a bee.
4. They speak Italian in Italy.
Italian is spoken in Italy.
5. They have taken his aunt to hospital.
His aunt has been taken to hospital by them.
6. The boys damaged the television.
The television was damaged by the boys.
7. Da Vinci painted the Mona Lisa.
The Mona Lisa was painted by Da Vinci.
8. He invited 30 people to his party.
30 people were invited by him to his party.
9. They grow bananas in Africa.
Bananas is grown in Africa.
1. finish
2. will begin
3. is going to rain
4. met
5. will be doing
6. will see
7. will get
8. does ... arrive
9. will have spent
10. will pay / am going to pay
11. will tell
12. is learning / learns
13. will be camping
14. is going to buy
15. will ... be working
16. will help
17. rings
18. Are ... going to use / Will ... be using
19. Are ... watching
20. will have arrived