登陆21世纪教育 助您教考全无忧 参考答案及听力录音材料： Section A 一、1. bottom 2. ecosystem 3. methods 4. coal 5. plastic【出处：21教育名师】 二、6. is too much 7. have fallen by 8. not only, but also 9. at the top of 10. develop laws 三、11. rubbish 12. health 13. sharks 14. bring 15. against 四、16. polluted 17. advantages 18. cost 19. wooden 20. differences 五、21. make a differen ce 22. cleaned up 23. play a part in 24. throw away 25. no more 六、26-30CADCB 31-35CDABA 七、36. not, an y longer 37. Why is 38. How should 39. more than 40. It is, to take action 八、41. If 42. but 43. Because 44. Although 45. so 九、46-50DABAB 51-55CBBDA 十、56. On April 22 57. we thank the Earth and learn some ways to protect her 58. which 59. (1) Global warming. (2) Water pollution. (3) Overusing resources 60. The Earth is in danger. 十一、61-65DBCAB 66-70DAABD Section B & Self Check 一、1. bottles 2. works 3. creativity 4. gate 5. iron21·cn·jy·com 二、6. put, to good use 7. building, out of 8. brought, back 9. Not only, but also 10. upside down 三、11. recycles 12. napkins 13. transportation 14. President 15. inspiration 四、16. environ mental 17. recyclable 18. specially 19. recently 20. importance 21. health y 22. creative 23. carefully 24. probably 25. actually 五、26. off 27. from 28. of / about 29. out 30. as 六、31-35CAADD 36-40BADDB 41-45DCABB 七、46. Everything, d on’t have 47. can be seen 48. How can, protect 49. To stop riding 50. Why do, need 八、51. The United Na tions wanted everyone to know that the world was in danger.21世纪教育网版权所有 52. Modern man and his technology. 53. that 54. 从中所赚的钱将用于帮助保护野生动物园。 55. Save the Earth 九、One possible version: Now, many wild an imals are in great danger of dying out because of humans' hunting and killing. It is our duty to protect them. To build zoos for them to live in is one of the ways.21教育网 Some people think it is a good way to build zoos for endangered animals to live in. First, zoos are safe places. Second, it will be easier for people especially the kids to see these animals. Third, when people know the animals are in danger, it will be helpful for them to know the importance of saving them. 21*cnjy*com But others don't a gree. First, they think these animals should live in the wild, and it is cruel for them to live in the cages. Second, if these animals live in the zoos for a long time, their ability of living outside will decrease. Third, it will break the balance of the ecosystem.【来源：21cnj*y.co*m】 But I think it is n ecessary for the animals to live in the zoos, because it can stop people from killing them. 单元整合与拔高 一、1. disadvanta ges 2. waste 3. are collected 4. have taken 5. should2·1·c·n·j·y 二、6-10BAADA 三、11. There used to be blue sky in my hometown. 12. We should choos e to take public transportation more to go outside.【版权所有：21教育】 13. We are happy to s ee out city has become more and more beautiful in the past few years. 14. These ... ...
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