Chia động từ trong ngoặc cho phù hợp
----- Nội dung ảnh -----
1. Chile is the world's largest ______________ of copper.
2. Plants are the main source of ______________ oxygen.
3. ______________ will be on the watch for damage to wildlife.
4. Tap water is usually heavily treated with ______________.
5. We should stop factories from producing ______________ gases.
6. ______________ are constantly being released into the atmosphere.
7. People are paying more for ______________ water than they are for gasoline.
8. When the bottle is empty, wash it out thoroughly before ______________.
9. ______________ were chosen by the students from among themselves.
10. The world is facing a problem of population ______________.
1. Chile is the world's largest ______________ of copper.
2. Plants are the main source of ______________ oxygen.
3. ______________ will be on the watch for damage to wildlife.
4. Tap water is usually heavily treated with ______________.
5. We should stop factories from producing ______________ gases.
6. ______________ are constantly being released into the atmosphere.
7. People are paying more for ______________ water than they are for gasoline.
8. When the bottle is empty, wash it out thoroughly before ______________.
9. ______________ were chosen by the students from among themselves.
10. The world is facing a problem of population ______________.