職稱英語理工類完形填空練習題及答案

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職稱英語理工類完形填空練習題及答案

　　The vultures in question may look ugly and threatening, but the sudden sharp __1__ in three species of India’s vultures is producing alarm rather than celebration, and it presents the world with a new kind of environmental __2__ The dramatic decline in vulture numbers is causing widespread disruption to people living in the same areas as the __3__ . It is also causing serious public health problems __4__ the Indian sub-continent.

職稱英語理工類完形填空練習題及答案

　　While their reputation and appearance may be unpleasant to many Indians，vultures have__5__played a very important role in keeping towns and villages all over India clean. It is__6__they feed on dead cows. In India, cows are sacred animals and are __7__ left in the open when they die in their thousands upon thousands every year.

　　The disappearance of the vultures has __8__ an explosion in the numbers of wild dogs feeding on the remains of these dead animals. There are fears that rabies may __9__ as a result. And this terrifying disease may ultimately affect humans in the region, since wild dogs are its main carriers. Rabies could also spread to other animal species, causing an even greater problem in the __10__.

　　The need for action is __11__, so an emergency project has been launched to __12__ a solution to this serious vulture problem. Scientists are trying to identify the disease causing the birds，deaths and, if possible, develop a cure.

　　Large-scale vulture __13__ 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 __14__ over 90 per cent. All three species are now listed as “critically endangered”. As most vultures lay only single eggs and __15__ about five years to reach maturity, reversing their population decline will be a long and difficult exercise.

　　練習：

　　1. A. decline B. rise C. teeth D. eyes

　　2. A. benefit B. debate C. problem D. solution.

　　3. A. plants B. birds C. humans D. cows

　　4. A. over B. with C. through D. across.

　　5. A. sometimes B. long C. suddenly D. hardly.

　　6. A. who B. when C. because D. where

　　7. A. traditionally B. occasionally C. possibly D. finally.

　　8. A. came from B. adjusted to C. resulted from D. led to.

　　9. A. drop B. increase C. disappear D. change.

　　10. A. future B. past C. villages D. mountains.

　　11. A. recent B. urgent C. frequent D. rare.