Onethingthetourbooksdon’ttellyouaboutLondonisthat2,000o...

問題詳情：

One thing the tour books don’t tell you about London is that 2,000 of its residents(居民) are foxes. They ran away from the city about centuries ago after developers and pollution moved in. But now that the environment is cleaner, the foxes have come home,.

“The number and variety of wild animals in urban(城市的)areas is increasing,” says Corner Jones. A survey of the wildlife in New York’s Central Park last year counted 14 species of mammals . A similar survey conducted in the 1890’s counted only five species.

Several changes have brought wild animals to the cities. Foremost is that air and water quality in many cities has improved as a result of the 1970s pollution-control efforts. Meanwhile, rural areas have been built up, leaving many animals on the edges of suburbs. In addition, urban wildlife refuges (避難處) have been created. The Greater London Council last year spent $750, 000 to buy land and build 10 permanent(永久*的) wildlife refuges in the city. As a result , many birds are now living in the city. By 1970 the birds had died out east of the Mississippi because the DDT had made their eggs too thin to support life. That year, scientist Tom Cade of Cornell University began raising the birds for release in cities, for cities afforded abundant food.

Cities can attract wild animals without turning them harmful. The trick is to create habitats where they can be self-sufficient but still be seen and appreciated. Such habitats can even be functional. In San Francisco, the local government is testing different kinds of rainwater control basins to see not only which ones keep the cleanest water but which will attract the most birds.

is the passage mainly about?

A．Wildlife  returning  to large cities.          B．Foxes returning to London.

C．Wild animals living in zoos.                D．A survey of wildlife in New York.

25:It can be inferred from the passage that ________.

A．Londoners are putting more and more wild animals into their zoos

B．Londoners are happy to see wild animals return to their city

C．Londoners are trying to move wild animals back to the countryside

D．Londoners have welcomed the wild birds, but found foxes a problem

rding to the passage, the number of species of wildlife in New York’s park________.

A．is slowly decreasing                                  B．is the same as that in other cities

C．is on the same level as before                   D．has more than doubled in the last century

h of the following is NOT a reason that wildlife is returning to the cities?

A．Food is plentiful in the cities.

B．Wildlife is appreciated in the cities.

C．Wildlife refuges have been built in the cities.

D．Air and water quality has improved in the cities.

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