1. Ba wrote this essay -> This essay was written by Ba 2. They sold two millions bottle of champagne last year -> Two millions bottle of champagne were sold last year 3. Someone stole Lan’s bike last night -> Lan’s bike was stolen last night 4. Hai didn’t break that vase -> That vase wasn’t broken by Hai 5. Did you close the windows last night? -> Were the windows closed last night? 6. When did you redecorate your kitchen? -> When was the kitchen redecorated? 7. They cancelled all the flights because of bad weather -> All the flights were cancelled because of bad weather 8. Someone broke into Mr. Bush’s hose last month -> Mr. Bush’s hose was broken into last month 9. Binh’s father used to take him to the zoo when he was small -> Binh used to be taken to the zoo by his father when he was small 10. People built this temple 200 years ago -> This temple was built 200 years ago 11. They advised the passengers not to leave their luggage unattended -> The passengers were advised not to leave their luggage unattended 12. Alexander G. Bell invented the telephone in 1876 -> The telephone was invented by Alexander G. Bell in 1876 13. The principal punished Peter -> Peter was punished by the principal 14. People cut down a lot of trees on the hill near my house last week -> A lot of trees on the hill near my house were cut down 15. The cat killed the mouse -> The mouse was killed by the cat 16. They invited a lot of people to their party last night -> A lot of people were invited to their party last night 17. Christopher discovered America in 1492 -> America was discovered by Christopher in 1492 18. What plays did Shakespeare write? -> What plays was written by Shakespeare? 19. A policeman took him to the police-station -> He was taken to the police-station by a policeman 20. His parents used to take him to the zoo when he was small -> He used to be taken to the zoo by his parents when he was small