1. We must learn about keeping the enviroment _____(pollute) 2. The accident happened because of _____driving ( care) 4. The inhabitants have made ___on how to protect the enviroment.(suggest) 5. It is _____that our enviroment is more and more polluted ( disappoint ) 8. A complaint letter should be ended _____(polite) ------------------------- 1. If you____ a student, you will get a discount on textbooks. ( be) 4. Please let me ____ if you know where she lives.( know) 6. What can you do in your school ______poluution?( minimize) 7. You just keep quiet and _____good.( be) 9. The best way to reduce garbage is _____and recycle things.( reuse) 10. _________ trash will pollute the air. ( burn)