Rewrite the sentences

1. I don’t want to buy a car. It is very expensive

………………………………………………………………….

2. “ Air pollution is a serious problem”

->the scientist said …………………………………………….

3. We should learn a foreign language

-> A foreign language …………………………………………….

4. People must protect our environment

-> Our environment must ……………………………………..

5. Go out now or you will be punished

-> If ………………………………………………………….

6 We use a lot of fertilizers. Our environment is polluted

If ………………………………………………………….