Dưới đây là những động từ được chia theo đúng ngữ pháp phù hợp với yêu cầu trong bài tập:

1. Chile is the world’s largest **producer** of copper.
2. Plants are the main source of **environmental** oxygen.
3. **Chemists** will be on the watch for damage to wildlife.
4. Tap water is usually heavily treated with **harmful** gases.
5. We should stop factories from producing **polluted** gases.
6. **Pollutants** are constantly being released into the atmosphere.
7. People are paying more for **bottled** water than they are for gasoline.
8. When the bottle is empty, wash it out thoroughly before **refilling**.
9. **Representatives** were chosen by the students from among themselves.
10. The world is facing a problem of population **explosion**.

Nếu bạn cần trợ giúp gì thêm, hãy cho tôi biết nhé!