1. People grow rice in many countries in the world.
-> Rice is grown in many countries in the world
2. Graham Bell invented the telephone many years ago.
-> The telephone was invented many years ago
3. They have used this car for many years.
-> This car has been used for many years
4. Lan practices English every day.
-> English is practiced by lan every day
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5. They will take the garbage out of the city.
-> The garbage will be taken our of the city 
6. Mary sent me this letter two days ago.
->I was sent this letter 2 days ago
7. People make compost from vegetables.
-> Compost is made from vegetables 
8. You must finish this work before Sunday.
-> This work must be finished before sunday
9. She hasn't used this bicycle for a long time.
-> This bicycle hasn't been used for a long time 
10. I saw a strange man in my garden yesterday.
-> A strange man was seen in my garden yesterday
11. They clean the floor every morning.
-> The floor is cleaned every morning 
12. They will solve the problem soon.
->The problem will be solved soon 
13. They break the glass into small pieces.
-> The glass is broken into small pieces 
15. They made these cars in the USA.
-> These cars was made in usa 
16. People have used the Internet all over the world.
-> The Internet has been used all over the world 
17. We planted many trees in the school garden.
-> Many trees were planted in the school garden
18. Someone has taken my book away.
-> My book has been taken away 
19. He didn't help me with my homework.
->I wasb't helped by him with my homework 
20. We have learnt English for three years.
-> English has been learnt for 3 years 
21. My father often reads books before bedtime.
-> Books is often used before bedtime 
22. Lan bought some comic books for her brother.
-> Some comic books were bought for her brother 
23. My sister received a letter yesterday. 
-> A letter was received yesterday
24. She can solve the problem in just 2 minutes.
-> The problem can be solved by her in just 2 mins
25. Nowadays people use electricity for lighting.
-> Electricity is used for lighting nowadays