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  3. Most people think of sharks as huge, powerful, frightening predators, ready at any moment to use their sharp teeth to attack swi

Most people think of sharks as huge, powerful, frightening predators, ready at any moment to use their sharp teeth to attack swi

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问题     Most people think of sharks as huge, powerful, frightening predators, ready at any moment to use their sharp teeth to attack swimmers. There are a lot of wrong ideas about sharks.
    First, there are about 350【C1】______of shark, and not all of them are large. They range in【C2】______from the dwarf shark, which can be only six inches long and can be held in the hand, to the whale shark, which can be more than 5 feet long.
    The second【C3】______of shark concerns its terrible teeth whose number and type can vary greatly among the different species of shark. A shark can have from one to seven【C4】______of teeth at the same time, and some types of shark can have several hundred teeth in each jaw. It is true that the cruel and predatory species do have【C5】______sharp teeth used to【C6】______and cut their victim apart, many other types of shark, however, have teeth more【C7】______to holding than to cutting.
    Finally, not all sharks are predatory animals ready to【C8】______out at humans. In fact, only 12 of the 350 species of shark have been known to attack humans, and a shark seldom【C9】______humans unless is made angry. The types of shark that have the worst record with humans are the tiger shark, the bull shark, and the great white shark. However, for most species of shark, even some of the largest types, there are no【C10】______instances of attacks on humans.
    A. attacks B. negotiate C. size D. declaration
    E. remote F. known G. misunderstanding H. notifying
    I. extremely J. species K sets L. hence
    M. tear N. strike O. suitable
【C4】
选项
答案K
解析 此处应为名词复数。本句讨论鲨鱼牙齿的数量，在词库中只有sets合适，seven sets of teeth意为“七副牙齿”。
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