2. 外语
  3. Most people picture sharks【C1】______huge, powerful, frightening【C2】______ready at any moments to use their sharp teeth to attack

Most people picture sharks【C1】______huge, powerful, frightening【C2】______ready at any moments to use their sharp teeth to attack

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问题     Most people picture sharks【C1】______huge, powerful, frightening【C2】______ready at any moments to use their sharp teeth to attack careless swimmers【C3】______provocation (挑衅). 【C4】______people may have some【C5】______ideas on the conception of sharks.
    First, there are 350 species of shark, and【C6】______them are large. They range in size from the dwarf shark, which can be only 6 inches long and can be held in the【C7】______of the hand,【C8】______the whale shark, which can be more than 55 feet long.
    Second, the different species of shark【C9】______tremendously in the number and type of teeth. A shark can have from one to seven sets of teeth【C10】______and some types of shark can have several hundred teeth in each jaw. It is true that the【C11】______and predatory species do possess extremely sharp and brutal teeth【C12】______their prey【C13】______Many other types of shark, however, have teeth more【C14】______to grabbing and holding than【C15】______cutting and slashing?
    Finally, all sharks【C16】______predatory animals ready to【C17】______humans. In fact, only 12 of the 350 species of shark have been known to attack humans, and a shark needs to be【C18】______in order to attack. The types of shark that have the【C19】______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 known【C20】______of attacks on humans?
【C6】
选项 A、each of
B、all of
C、not all of
D、not every one of
答案C
解析 语义衔接题。下文提到鲨鱼的大小从只有6英寸长的“矮子鲨鱼”到55英尺长的“鲸鲨”不等，所以“不是所有”的鲨鱼都是大型的，因此用not all of.
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