11. When is someone going to announce the results of the contest?
=> When are the results of the contest going to be announced ?
12.
13. Kathy had returned the book to the library.
=>the book had been returned to the library by Kathy
14.By this time tomorrow, the president will have made the announcement.
=>By this time tomorrow, the announcement. will have been made by the president 
15.The pollution in the city was affecting people’s breathing.
=>people’s breathing. was being affected by The pollution in the city
16.Mrs Andrews hasn’t signed those papers yet. Has Mr Andrews signed them yet?
=>those papers haven’t been signed by Mrs Andrews yet. have them been signed by Mr Andrews yet?
17.Is a student pilot flying that airplane?
=>is that airplane being flied by a student pilot?



 

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11.  When are the results of the contest going to be announced?
12. It is informed that there had been a mistake.
13. The book had been returned to the library by Kathy.
14. By the time tomorrow, the announcement will have been made by the president.
15. People's breathing was affected by the pollution in the city.
16. Those papers haven't been signed by Mrs. Andrew yet.
17. Is that airplane being flown by a student pilot?
18. Where was the 1988 Olympic Games held?
19. The engine of the car has to be repaired.
20. The window was broken and some pictures were taken away by the boys.
21. A lot of money on advertising is spent every day.
22. A story is going to be told by the teacher.
23. A cake is being cut with a sharp knife by Mary.
24. English is spoken in almost every corner of the world.
25. English is learned in the room.
26. All the workers were being instructed by the chief engineer.
27. Tea can't be made with cold water.
28. Proper encouragement is always given by my parents.
29. That money has been sent to the poor families.
30. The first steam-engine was invented by Stephenson.