1. You ……………… use chemical products.
2. People …………………………. keep the environment clean.
3. My father ……………. eat junk food. He is very fat.
4. You …………. waste energy.
5. People …………. protect animal species.
6. Everybody ………………… recycle the products.
7. You ……………….. put the rubbish out.
8. The students …………. learn everything about environment pollution.
9. You …………. drive fast.
10. You …………… wear thin clothes in cold weather.
Answers:
1. shouldn’t 2. should 3. shouldn’t 4. shouldn’t 5. should
6. should 7. should 8. should 9. shouldn’t 10. shouldn’t