2. 外语
  3. Zoos have existed for so long that no one knows the origins of the first ones. At one time, zoos were【C1】______to entertain king

Zoos have existed for so long that no one knows the origins of the first ones. At one time, zoos were【C1】______to entertain king

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问题     Zoos have existed for so long that no one knows the origins of the first ones. At one time, zoos were【C1】______to entertain kings, queens, princes and princesses. Today, there are probably over 500 public zoos【C2】______the world. The one with the greatest【C3】______of animals is in Berlin. Years ago, zoos always【C4】______animals in barred cages, but now zoos try to keep their animals in more natural surroundings. As a result, there is great【C5】______in the ways animals are treated, housed and bred. One of the best zoos in the United States is at San Diego in California, where the climate makes it possible for the animals to live【C6】______most of the year. As civilization spreads and natural wildernesses are reduced, zoos have become more important. They【C7】______places where rare animals can be saved from extinction.
    Game reserves have【C8】______in parts of Europe for hundreds of years for hunting purposes. Today, however, they are usually places where wildlife are safe from hunters and can live and breed【C9】______by man. One of the largest【C10】______in the world is the Kruger National Park in South Africa, where elephants, zebras and lions are among the attractions.
A)preparation B)variety C)around D)provide
E)used F)outdoors G)kept H)saving
I)undisturbed J)improvement K)reserves L)passionate
M)reasonable N)existed O)unhappy
【C8】
选项
答案N
解析 根据for hundreds of years和空前的have可知，这里应该填动词的过去分词．而此句是在说狩猎保护区在欧洲的历史，动词应该表示存在，故选existed。
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大学英语四级

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