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  3. The relationship between human and dog dates back to at least 8,000 years ago. Different types of dogs were developed for differ

The relationship between human and dog dates back to at least 8,000 years ago. Different types of dogs were developed for differ

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问题     The relationship between human and dog dates back to at least 8,000 years ago. Different types of dogs were developed for different【S1】______: the ancient people in west Asia, for example, trained greyhounds (灰狗) to chase wild asses; in medieval manuscripts, illustrations of hunting scenes show terriers (猎犬) pursuing rabbits.
    Recent research shows that dogs【S2】______another useful function: they keep us【S3】______. People who have any sort of pet are more likely to【S4】______heart attacks (blood pressure rises when we talk to one another whereas it drops when we pat a pet). Dog owners in particular show considerably improved self-esteem and a 50%【S5】______in minor health problems only ten months after acquiring their pet.
    In the UK, thousands of people visit the annual dog show, "Crufts", held in London. This show receives wide national and international media【S6】______. Fierce discussions rage when dog liberty is threatened. There is no dog license in the UK because it was【S7】______several years ago. A recent law, the Dangerous Dogs Act, requires owners of【S8】______vicious dogs, such as Pit Bull Terriers, to【S9】______their dogs with the authorities and muzzle (戴口罩) them when taking them outside. There was a great protest from the public when this law was【S10】______.
[A] abolished [F] endure [K] healthy
[B] reduction [G] coverage [L] challenges
[C] especially [H] introduced [M] abandoned
[D] register [I] tasks [N] survive
[E] sick [J] perform [O] respectively
【S1】
选项
答案I
解析 空前的different表明，本空应填复数名词，[I]tasks和[L]challenges入选。冒号后面的内容是对本空的解释说明。后面举了两个例子，一个是古代西亚人训练灰狗追捕野驴，另一个是中世纪的书稿里面有猎犬追捕兔子的插图，由此可见，不同种类的狗被训练做不同的事情，故答案为[I]tasks“任务，工作”。
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大学英语四级

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