1. What we must do is to keep the earth ......... (pollute). 2. We must use electricity ........ (economy) 3. Some volunteer ............. are cleaning up the beach (conserve) 4. Until her illness she was the main ....... in the family (provide) 5. I am ......... disappointed to know my children have not cleaned up all the trash (extreme) 6.Neighbors ........ to the police about the noise from that house last night. (complaint) 7. Smoking does harm ..... to people's health (repair) 8. Speaking in public seems to come quite .... to her (nature) 9. The lava in that vocalno ......... as it cools (solid) 10. Paper and most plastics are ........ materials (recycle) 11. What should you do at school to ...... pollution? (minimum) mn nhớ ghi tại sao nó lại là đáp án đó hộ mk nha bởi vì mk chủ yếu là ghi CT với cả dhnb