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(jù)短文內(nèi)容為每處空白確定1個最佳答案。

Why India Needs Its Dying Vultures

The vultures(禿鷹)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(狂犬癥) may increase as a result. And this terrifying disease may ultimately(最終)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 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：CC  BB    DBADB CABDC

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