=>
1. Rice is grown in tropical countries.
2. His windows was broken last night.
3. The lost boy wasn't found yesterday
4. The injured player off the field was being carried.
5. The article have been typed recently by Jack.
6. The murderer hasn't been found by the police.
7.Old men should be treated with respect.
8. All the accounts can be done by the computer.
9. A new school is going to be built.
10. That house isn't going to be bought.
11. That house will be pulled down.
12. This room hasn't been used for ages.
13. That problem can't be solved
14. We were not told the news.
15. A prize will be given to her by teacher if she works well.
16. She was bought a doll by her mother last week.
17. She has been heard to sing this song several times by me.
18.
=> It was reported that the President had suffered a heart attack.
=> The president was reported to have had a heart attack.
19.
=> Mary is having her hair cut...
=> Mary is having the hairdresser cut her hair now.
20. It is known to be an international language.
21.
=> It was said that she won the competition.
=> She was said to have won the competition.