Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. 6. I think the waste from the factory has __________ the lake. A. damaged B. pollution C. polluted D. damage 7. If the factory continues dumping poisons into the lake, all the fish and other _________ animals will die. A. aquatics B. aquatic C. aquatical D. aquatically 8. People’s activities are a major cause of pollution resulting _______climate change and some disasters such as deforestation, tsunamis, etc. A. in B. on C. at D. to 9. If we recycle more, we _______________ the Earth. A. help B. would help C. helping D. will help 10. A huge amount of _________ chemical waste is dumped into the lake. A. poison B. poisoning C. poisonous D. poisons 11. The crop was severely ________ by the acid rain. A. damaged B. poisoned C. polluted D. contaminated 12. Many people _________ litter on the streets. A. pay B. give C. catch D. throw 13. When _________ pollution happens, the water temperature in streams, rivers and lakes, or oceans changes. A. water B. thermal C. temperature D. heat 14. The sight of too many telephones poles, advertising billboards, overhead power lines, or shop signs may cause _______. A. light pollution B. air pollution C. visual pollution D. sight pollution 15. Many children around the world are suffering from birth defects because their parents are _________ to radiation. A. worked B. exposed C. expressed D. supposed 16. I wouldn’t throw litter on the ground if I ________ you. A. are B. were C. will be D. am 17. Many people around the world ________ to the Big Ben in London for many recent years. A. travel B. have travelled C. are travelling D. travelled