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 by Graham Bell many years ago.
3) Lan practise English everyday.
=> English is practised by Lan everyday.
4) They will take the garbage out of the city.
=> The garbage will be taken out of the city.
5) Mary sent me this letter two days ago.
=> I was sent this letter by Mary two days ago.
6) People make compost from vegetables.
=> Compost is made from vegetables.
7) You must finish this work.
=> This work must be finished.
8) I saw a strange man in my garden yesterday.
=> A strange man was seen my garden yesterday.
9) They clean the floor every morning.
=> The floor is cleaned every morning.
10) They will slove the problem soon.
=> The problem will be sloven soon.
11) They break the glass into small pieces.
=> The glass is broken into small pieces.
12) They made these cars in the USA.
=> These cars were made in the USA.
13) We planted many trees in the school garden.
=> Many trees were planted in the school garden.