第5部分：補全短文（第46-50題，每題2分，共10分)
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The Tough Grass that Sweetens Our Lives52667788.cn
Sugar cane was once a wild grass that grew in New Guinea and was used by local people for roofing their houses and fencing their gardens. Gradually a different variety evolved which contained sucrose and was chewed on for its sweet taste. Over time, sugar cane became a highly valuable commercial plant, grown throughout the world. 46.
Sugar became a vital ingredient in all kinds of things, from confectionery to medicine, and, as the demand for sugar grew, the industry became larger and more profitable. 47. Many crops withered and died, despite growers’ attempts to save them, and there were fears that the health of the plant would continue to deteriorate.
In the 1960s, scientists working in Barbados looked for ways to make the commercial species stronger and more able to resist disease. They experimented with breeding programmes, mixing genes from the wild species of sugar cane, which tends to be tougher, with genes from the more delicate, commercial type. 48. This sugar cane is not yet ready to be sold commercially, but when this happens, it is expected to be incredibly profitable for the industry.
49. Brazil, which produces one quarter of the world's sugar, has coordinated an international project under Professor Paulo Arrudo of the Universidade Estaudual de Campinas in Sao Paulo. Teams of experts have worked with him to discover more about which parts of the genetic structure of the plant are important for the production of sugar and its overall health.
Despite all the research, however, we still do not fully understand how the genes function in sugar cane. 50. This gene is particularly exciting because it makes the plant resistant to rust, a disease which probably originated in India, but is now capable of infecting sugar cane across the world. Scientists believe they will eventually be able to grow a plant which cannot be destroyed by rust.
A. Unfortunately, however, the plant started to become weaker and more prone to disease.
B. Sugar cane was now much vigorous and the supply of sugar is therefore more guaranteed.
C. One major gene has been identified by Dr Angelique D'Hont and her team in Montpelier, France.
D. The majority of the world's sugar now comes from this particular commercial species.
E. Since the 1960s, scientists have been analysing the mysteries of the sugar cane's genetic code.
F. Eventually, a commercial plant was developed which was 5 percent sweeter than before, but also much stronger and less likely to die from disease.
第6部分：完形填空（第51-65題，每題1分，共15分)
下面的短文有15處空白，請根據短文內容為每處空白確定1個最佳選項。
Why India Needs Its Dying Vultures
The vultures in question may look ugly and threatening, but the sudden sharp decline in three species of India’s vultures is producing alarm rather than celebration, and it presents the world with a new kind of environmental problem. The dramatic (51) in vulture numbers is causing widespread disruption to people living in the (52) areas as the birds. It is also causing serious public health problems (53) the Indian sub-continent.
While their reputation and appearance may be unpleasant to many Indians, vultures have (54) played a very important role in keeping towns and villages all over India (55) . It is because they feed on dead cows. In India, cows are sacred animals and are (56) left in the open when they die in their thousands upon thousands every year.
The disappearance of the vultures has (57) an explosion in the numbers of wild dogs feeding on the remains of these (58) animals. There are fears that rabies may increase as a result. And this terrifying disease may ultimately affect humans in the region, (59) wild dogs are its main carriers. Rabies could also spread to other animal species, (60) an even greater problem in the future.
The need for action is (61) , so an emergency project has been launched to find a solution to this serious vulture problem. Scientists are trying to (62) the disease醫(yī)學全在線52667788.cn causing the birds’ deaths and, if possible, develop a cure.
Large-scale vulture (63) were first noticed at the end of the 1980s in India. A population survey at that time showed that the three species of vultures had declined (64) over 90 per cent. All three species are now listed as “critically endangered”. As most vultures lay only single eggs and (65) about five years to reach maturity, reversing their population decline will be a long and difficult exercise.
51. A. increase B. threat C. decline D. risk
52. A. small B. different C. same D. safe
53. A. above B. with C. across D. through
54. A. rarely B. long C. recently D. seldom
55. A. dangerous B. clean C. smelly D. beautiful
56. A. immediately B. occasionally C. hardly D. traditionally
57. A. acted as B. led to C. come from D. slowed down
58. A. dead B. strange C. wild D. endangered
59. A. when B. so C. whether D. since
60. A. improving B. causing C. predicting D. finding
61. A. frequent B. regular C. urgent D. sudden
62. A. identify B. prove C. test D. check
63. A. injuries B. deaths C. arrivals D. attacks
64. A. in B. on C. along D. by
65. A. waste B. consume C. take D. adopt
參考答案
第1部分：詞匯選項
1. C. strange醫(yī)學全在線52667788.cn
2. C. about
3. A. found by chance
4. D. inflexible
5. A. unbelievable
6. D. offensive
7. C. spread
8. B. influence
9. B. travel
10. D. attracted
11. A. cautious
12. D. fixed
13. B. break
14. C. end
15. A. understand
第2部分：閱讀判斷
16-22 ABAACBC
第3部分：概括大意與完成句子
23-26 CFEA 27-30 BCDE
第4部分：閱讀理解
31-35 BAAAC 36-40 DCDAD 41-45 AABDB
第5部分：補全短文
46-50 DAFEC
第6部分：完形填空
51-55 CCCBB 56-60 DBADB 61-65 CABDC
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