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
【C1】
选项
答案E
解析 根据空前were后的不定式可知。此处应填入动词被动语态，故填动词的过去分词，而后面的内容是动物园的用途，故填used。
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