1. I will buy a computer tomorrow.
=> A computer will be bought by me tomorrow.
2. People are destroying large areas of the forest every day.
=> Lagre areas of the forest are being destroyed every day.
3. The students usually hold the concerts at the university.
=> The concerts are usually held at the university by the students.
4. The teacher is going to collect our papers.
=> Our papers are going to be collected by the teacher.
5. A storm destroyed the small fishing village.
=> The small fishing village was destroyed by a storm.
6. I had returned the books to the library.
=> The books have been returned to the library by me.
7. They are televising the World Cup soccer all over the world.
=> The World Cup soccer is being televised all over the world.
8. Translators have translated that book into many languages.
=> That book has been translated into many languages by translators.
9. They will send you a bill at the end of the month.
=> A bill will be sent you at the end of the month.
10. People grow rice in many countries.
=> Rice are growed in many countries.
11. The teacher is giving a test in the next room right now.
=> A test is being gived in the next room by the teacher right now.
12. You must write the answers on the side of the paper.
=> The answers must be written by you on the side of the paper.
13. Mr Brown looked the box and nobody could open it.
=> The box was looked by Mr Brown and it couldn't be opened.
14. No one believes his story.
=> His story isn't believed.
15. They hadn’t moved anything until the police came.
=> Nothing had been moved until the police came.