题目内容
语篇理解：
Modern zoos are very different from zoos built fifty years ago .At that time, zoos were places where people could go to see animals from many parts of the world. The animals lived in cages（笼）with iron bars（栅）, cages that were easy to keep clean. However,for the animals ,the cages were small and impossible to hide in .Although the zoo keepers took good care of them, many of the animals did not feel comfortable,and they often became ill .
In modern zoos, people can see animals in more natural conditions. The animals are given more freedom in larger places so that they can live more as they would in nature. Even the appearance（外貌）of zoos has changed. Trees and grass grow in the cages, and water flows through the places that the animals live in . There are few bars; instead ,there is often a deep ditch（沟）,filled with water, which surrounds a space where several sorts of animals live together as they would naturally. In an American zoo, the visitor can walk through a huge special cage filled with trees, some small animals and many birds, and large enough for the birds to live naturally.
In a zoo in New York , because of special night light , people can observe certain animals that are active only at night , when most zoos are closed. Some zoos have special places for visitors to watch animals that live in the desert ,or under water. Some other zoos have special place for animals that live in cold conditions like the bear from the Arctic.
Modern zoos not only show animals for visitors, but also keep and save rare（稀有的）animals .For this reason , fifty years from now, the grandchildren of today’s visitors will still be able to enjoy watching these animals.
(1)Fifty years ago ,animals in zoos often became ill because they ______.
A．were from different countries
B．lived in dirty cages
C．were not taken good care of
D．lived in unnatural conditions
(2)In modern zoos ______.
A．different kinds of animals are all kept separately
B．animals are not so well taken care of
C．animals have more freedom than animals did in zoos fifty years ago .
D．visitors can walk through large cages as they like
(3)In modern zoos ______ feel more comfortable than in old ones.
A．the animals , not the visitors
B．the visitors , not the animals
C．neither the animals nor the visitors
D．the animals
(4)In some modern zoos visitors can ______ .
A．walk through a huge cage to watch closely all kinds of animals
B．at day time observe those animals active only at night
C．see animals which live in special conditions
D．watch all the rare animals which will not be seen by our grandchildren
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