Choose a, b, c, d that best completes each unfinished sentence; substitutes the underlined part; or has a close meaning to the original one. 6. Laws have been introduced to prohibit the killing of endangered animals. a. advised b. decreased c. ban d. encouraged 7. Hunting for meat and burning forests for soils _________ wildlife. a. protect b. conserve c. destroy d. survive 8. National Parks are established to create the environment for rare animals to survive and ______offspring. a. produce b. supply c. increase d. offer 9. The World Wild Funds is working to protect and save the forests that are ________ in a. danger b. interest c. encouragement d. consequence 10. Scientists think it unlikely that the species will actually become ex­tinct as a _______ of the oil spill. a. respect b. consequence c. protection d. production 11. Human beings can exist without water and air. a. result b. live c. kill d. change 12. Do you know exactly ______ number of Siberian tigers in China? a. a b. an c. the d. 0 13. Garbage is considered to be some kind of_______ a. pollute b. pollutants c. pollution d. polluting 14. Because of forest destruction some rare animals cannot survive, left alone _______ a. produce b. production c. productive d productivity 15. The people in our village are leading a _________life. a. a. peace b. peaceful c. peacefully d. peacefulness 16. Human beings are changing the environment _________ all respects. a. at b. for c. in d. upon 17. Air pollution interferes_______ our body's ability to process oxygen. a. with b. on c. to d. over 18. We should do something immediately to save many kinds of rare animals _________extinction. a. away b. from c. in d. with 19. I personally think that it is easy to understand ______ time is relative a. the reason b. the reason for that c. for which reason d. the reason why 20. ________concerns about wildlife never keeps a wild animal as pest. a. Anyone that b. Anyone which c. Anyone for whom d. Anyone those 21. Did you listen to the lecture on the environment by Dr. Pike,______ a. whom I have ever told you about b. about that I have ever told y c. I have ever told you d. that I have ever told you 22. _____want to use rain forests are cutting them down without any hesitation a. People who b. People which c. People-whom d. Who 23. The man showed us the cage _________he kept a fierce lion. a. Which b. that c. in which d. in that. 24. Those villagers _________near the forest chop down hardwoods 'to sell for high prices, a. live b. who live c. whom live d. for whom to live 25. We have just had an exploration through that forest _________. a. which some pandas survive b. where. there are some pandas surviving c. in which there are some pandas survive d. that. some pandas survive 26. By cutting down the trees, people destroy the ecosystem of the rain forest ________ a. on. which they depend b. where they depend on c. which they depend d. where they depend 27. _____comes from thousands of factories has caused enormous in­ creases in air pollution levels. a. Smoke b. Smoke for which c. Smoke that d. Smoke whose 28. The areas ______are destroyed suffer a lot from soil erosion. a. which trees b. whose trees c. that trees d. trees which 29. I will never forget the time _____ I first visit Cat Tien National Park.. a. when b. why c. where d. on that 30. Those scientists are doing research on the period the Earth formed. a. where b. on that c. when d. why