Passage 3

　　Questions 11 to 15 are based on the following passage:

　　Scientists were embroiled(使…卷入) last week in an international row over genetically modified cotton (GM cotton).

　　A study in China suggested for the first time that the crop was permanently damaging the environment and that insects were building up resistance to it.

　　The study, by the Nanjing institute of Environmental Science, combined the laboratory and field work from four Chinese scientific institutes. The study was done over a several-year period.

　　GM cotton had a gene resistance to the cotton bollworm棉铃虫) and isolated from the bacterium (细菌) named Bacillus thuringiensis (Bt), but the study found that it harms the natural parasitic (寄生的) enemies of the cotton bollworm.

　　It also indicated that populations of pests besides the bollworm had increased in Bt cotton fields and some had replaced the bollworm as the primary pest.

　　However, the leading GM company, the US's Monsanto, which controls more than 80 per cent of the Bt cotton grown worldwide, dismissed the research.

　　It said that the industry has always cited GM cotton as its biggest success, because it can increase yields by up to 60 per cent and reduce the need for pesticides(杀虫剂) by 80 per cent.

　　But, unfortunately for the industry, (80) the scientists also found that the resistance of Bt cotton to bollworm decreased significantly over time.

　　11. Why scientists say no to GM cotton?

　　A. Because the cotton was genetically modified.

　　B. Because the cotton was found to damage the environment.

　　C. Because the cotton harms the bollworm.

　　D. Because Monsanto dismissed the research.

　　12. The underlined word "yields" means________

　　A. plants B. giving up

　　C. establishment D. productions

　　13. In Bt cotton fields, some pests replaced the bollworm as the primary pest because __

　　A. their favorite food is Bt cotton

　　B. the bollworms were killed out by the Bt cotton

　　C. both their enemies and the bollworm were all killed by Bt cotton

　　D. people used the pesticides

　　14. Which of the following is NOT the difference between Bt cotton and common cotton?

　　A. Bt cotton is stronger than common cotton.

　　B. Bt cotton yields more than common cotton.

　　C. Bt cotton needs less pesticides than common cotton.

　　D. Bt cotton is harm to cotton bollworms.

　　15. The author imply that __

　　A. The US's Monsanto agreed with the results of Chinese scientists' study

　　13. GM cotton is an ideal crop

　　C. The US's Monsanto dismissed the research for its own profit

　　D. Cotton bollworm has no resistance to Bt cotton over time

　　Part II Vocabulary and Structure (30%)

　　Directions: In this part there are 30 incomplete sentences. For each sentence there are four choices marked A, B, C, and D. Choose the ONE answer that best completes the sentence.

　　16. If I ___ an umbrella with me, I wouldn't get wet on that rainy day.

　　A. took B. had taken C. take D. am taking

　　17. They liked the country ____they are stationed.

　　A. where B. which C. in which D. what

　　18. Having been served lunch,___________

　　A. the problem was discussed by the committee

　　B. the committee discussed the problem

　　C. it was discussed by the committee the problem

　　D. a discussion of the problem was discussed

　　19. __ bricks, workers must press clay into blocks at first.

　　A. Being made B. The making of

　　C. To make D. Made

　　20. Technology will play a key role in __ future lifestyle.

　　A. to shape B. shaping

　　C. shape of D. shaped

　　21. The customer accused the seller __ fake monkey.

　　A. to use B. for using

　　C. of using D. about using

　　22. You should ask ___ your parent's opinions about this matter.

　　A. after B. to C. with D. of

　　23. Mercury (水银) is ___ all metal because it is liquid.

　　A. more than difference B. most different in

　　C more difference of D. the most different of

　　24. Early forms of life on Earth, ___ in absence of oxygen, required other elements.

　　A. which lived B. that lived

　　C. lived D. were living

　　25. __ 1895 did Cornell University begin to offer a degree in ornithology (鸟类学).

　　A. Not until B. Not since C. Until D. In

　　26. The chief foods eaten in any country depend largely on ___ best in its climate and soil.

　　A. it grows 13. what grows

　　C. does it grows D. what does it grow

　　27. I whish I __ you.

　　A. am B. was C. were D. be

　　28. It will be better that we ________the trip the other day.

　　A. take B. took

　　C. would have taken D. will take

　　29. In the United States, a primary election is a method __ voters select the nominees (被提名的候选人) for public office.

　　A. that B. by which

　　C. is that D, by those

　　30. Only rarely __ earthquakes occur in the United States east of the Mississippi River.

　　A. had B. when

　　C. that D. do