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After many considerations and years of h...

    After many considerations and years of heated argument, gray wolves were brought back to Yellowstone National Park. Fourteen wolves were caught in Canada and transported to the park. By last year, the Yellowstone wolf population had grown to more than 170 wolves.

Gray wolves once were seen here and there in the Yellowstone area and much of the continental United States, but they were gradually displaced by human development. By the 1920s, wolves had practically disappeared from the Yellowstone area. They went farther north into the deep forests of Canada, where there were fewer humans around.

The disappearance of the wolves had many unexpected results. Deer and elk populations — major food sources for the wolf — grew rapidly. These animals consumed large amounts of vegetation (植被), which reduced plant diversity in the park. In the absence of wolves, coyote populations also grew quickly. The coyotes killed a large percentage of the park’s red foxes, and completely drove away the park’s beavers.

As early as 1966, biologists asked the government to consider reintroducing wolves to Yellowstone Park. They hoped that wolves would be able to control the elk and coyote problems. Many farmers opposed the plan because they feared that wolves would kill their farm animals or pets.

The government spent nearly 30 years coming up with a plan to reintroduce the wolves. The U.S. Fish and Wildlife Service carefully monitors and manages the wolf packs in Yellowstone. Today, the debate continues over how well the gray wolf is fitting in at Yellowstone. Elk, deer, and coyote populations are down, while beavers and red foxes have made a comeback. The Yellowstone wolf project has been a valuable experiment to help biologists decide whether to reintroduce wolves to other parts of the country as well.

1.What is the text mainly about?

A. Wildlife research in the United States.

B. Plant diversity in the Yellowstone area.

C. The conflict between farmers and gray wolves.

D. The reintroduction of wolves to Yellowstone Park.

2.What does the underlined word “displaced” in paragraph 2 mean?

A. Tested.

B. Separated.

C. Forced out.

D. Released.

3.What did the disappearance of gray wolves bring about?

A. Damage to local ecology.

B. A decline in the park’s income.

C. Preservation of vegetation.

D. An increase in the variety of animals.

4.What is the author’s attitude towards the Yellowstone wolf project?

A. Doubtful.

B. Positive.

C. Disapproving

D. Uncaring.

 

1.D 2.C 3.A 4.B 【解析】 本文是一篇说明文。文章介绍了美国黄石公园重新引进灰狼的事情。因为人类活动影响,狼的数量逐渐减少,鹿群数量逐渐增加,从而造成植被遭到大量破坏。为了解决鹿群和土狼的问题,黄石公园又重新引入了灰狼,取得了良好的效果。 1.主旨大意题。文章开门见山指出黄石公园引进灰狼的举措,之后在下文详细介绍了原因以及带来的良好的转机,由此判断本文主要是关于美国黄石公园对灰狼的引进。故选D。 2.词义猜测题。根据本段尤其是划线词后的两句“Gray wolves once were seen here and there … but they were gradually displaced by human development. By the 1920s, wolves had practically disappeared from the Yellowstone area. They went farther north into the deep forests of Canada, where there were fewer humans around.”可知,因为人类的发展,侵占了灰狼的领域,灰狼逐渐向北迁徙,由此推断灰狼被人类排挤走了。分析选项可知C. Forced out(被排挤出去)符合题意,故选C。 3.细节理解题。根据第三段内容“The disappearance of the wolves had many unexpected results. Deer and elk populations — major food sources for the wolf — grew rapidly. These animals consumed large amounts of vegetation (植被), which reduced plant diversity in the park…completely drove away the park’s beavers.”可知,灰狼的减少造成了鹿群的增多,从而植被遭到了破坏;而且红狐和海狸也不断减少,由此推断灰狼的消失引起了当地生态的破坏。分析选项可知A(破坏当地生态)符合题意,故选A。 4.推理判断题。根据文章末段末句“The Yellowstone wolf project has been a valuable experiment to help biologists decide whether to reintroduce wolves to other parts of the country as well.”可知,作者认为引进灰狼的项目是很有价值的实验,是很值得推广的。所以作者对黄石公园引进灰狼的态度是积极的,赞成的,故选B。
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