（六）
Crocodiles are51．unique species and they52．(survive) dinosaurs by some 65 million years so far. One reason53．they are such good survivors is that they can go for a very long time54．eating anything. And they are expert hunters, 55．(use) their strong jaws to bite their prey and then swallow it whole. When they lose a tooth they grow one right back. A crocodile can go through 8,00056．(tooth) in one lifetime! What does the expression “crocodile tears” mean? 57．(put) it simply, “crocodile tears” are fake58．(sad). The phrase “crocodile tears” comes from an old myth that crocodiles would shed tears while eating their prey. A religious worker wrote that when a crocodile found a man by the water, it would kill him if it could. Then the crocodile would cry tears on the man, but then finally swallow59．. Scientists explain that crocodiles do create tears, but they do not cry. The tears help to clean their eyes. Crying is60．(complete) emotional and it is reserved for us humans.
参考答案与解析（六）
51．a
52．have survived
53．why
54．without
55．using
56．teeth
57．To put
58．sadness
59．him
60．completely
【分析】
这是一篇说明文。文章介绍了鳄鱼的历史和“鳄鱼的眼泪”含义以及科学家解释。
51．
考查冠词。句意：鳄鱼是一种独特的物种，迄今为止，它们比恐龙多存活了约6500万年。此处泛指“一种独特的物种”，unique开头发音是辅音[j]，用不定冠词a表泛指。故填a。
52．
考查时态。句意：鳄鱼是一种独特的物种，迄今为止，它们比恐龙多存活了约6500万年。此处缺乏谓语，结合so far可知此处用现在完成时，主语they是复数，谓语也用复数形式。故填have survived。
53．
考查定语从句。句意：它们之所以是如此优秀的幸存者，一个原因是它们可以长时间不吃任何东西。此句为定语从句，先行词one reason，在从句they are such good survivors作原因状语，用关系副词why引导。故填why。
54．
考查介词。句意：它们之所以是如此优秀的幸存者，一个原因是它们可以长时间不吃任何东西。结合句意可知，此处表达“没有”，后面接动名词短语eating anything，用介词without。故填without。
55．
考查非谓语动词。句意：它们是专业的猎手，用它们强壮的下颚咬住猎物，然后整个吞下。本句已有系动词are且无连词，动词use用非谓语形式，逻辑主语they与动词use是主谓关系，用现在分词（doing）表主动，作状语。故填using。
56．
考查名词复数。句意：一条鳄鱼一生可以长8000颗牙齿！前面有数词8,000，此处名词用复数形式。故填teeth。
57．
考查非谓语动词。句意：简单地说，“鳄鱼的眼泪”是假的悲伤。此处用动词不定式（to do）表目的，做目的状语，首字母大写。故填To put。
58．
考查名词。句意：简单地说，“鳄鱼的眼泪”是假的悲伤。可知结合提示，应该说简单地说,"鳄鱼眼泪"是假的悲伤。前面是形容词fake，此处应该用名词形式作表语。故填sadness。
59．
考查代词。句意：然后鳄鱼会在那人身上哭泣，但最后还是把他吞了下去。此处指代the man，做宾语用him。故填him。
60．
考查副词。句意：哭泣是完全情绪化的，是留给我们人类的。此处用副词completely作状语，修饰形容词emotional。故填completely。
Crocodiles are51．unique species and they52．(survive) dinosaurs by some 65 million years so far. One reason53．they are such good survivors is that they can go for a very long time54．eating anything. And they are expert hunters, 55．(use) their strong jaws to bite their prey and then swallow it whole. When they lose a tooth they grow one right back. A crocodile can go through 8,00056．(tooth) in one lifetime! What does the expression “crocodile tears” mean? 57．(put) it simply, “crocodile tears” are fake58．(sad). The phrase “crocodile tears” comes from an old myth that crocodiles would shed tears while eating their prey. A religious worker wrote that when a crocodile found a man by the water, it would kill him if it could. Then the crocodile would cry tears on the man, but then finally swallow59．. Scientists explain that crocodiles do create tears, but they do not cry. The tears help to clean their eyes. Crying is60．(complete) emotional and it is reserved for us humans.
参考答案与解析（六）
51．a
52．have survived
53．why
54．without
55．using
56．teeth
57．To put
58．sadness
59．him
60．completely
【分析】
这是一篇说明文。文章介绍了鳄鱼的历史和“鳄鱼的眼泪”含义以及科学家解释。
51．
考查冠词。句意：鳄鱼是一种独特的物种，迄今为止，它们比恐龙多存活了约6500万年。此处泛指“一种独特的物种”，unique开头发音是辅音[j]，用不定冠词a表泛指。故填a。
52．
考查时态。句意：鳄鱼是一种独特的物种，迄今为止，它们比恐龙多存活了约6500万年。此处缺乏谓语，结合so far可知此处用现在完成时，主语they是复数，谓语也用复数形式。故填have survived。
53．
考查定语从句。句意：它们之所以是如此优秀的幸存者，一个原因是它们可以长时间不吃任何东西。此句为定语从句，先行词one reason，在从句they are such good survivors作原因状语，用关系副词why引导。故填why。
54．
考查介词。句意：它们之所以是如此优秀的幸存者，一个原因是它们可以长时间不吃任何东西。结合句意可知，此处表达“没有”，后面接动名词短语eating anything，用介词without。故填without。
55．
考查非谓语动词。句意：它们是专业的猎手，用它们强壮的下颚咬住猎物，然后整个吞下。本句已有系动词are且无连词，动词use用非谓语形式，逻辑主语they与动词use是主谓关系，用现在分词（doing）表主动，作状语。故填using。
56．
考查名词复数。句意：一条鳄鱼一生可以长8000颗牙齿！前面有数词8,000，此处名词用复数形式。故填teeth。
57．
考查非谓语动词。句意：简单地说，“鳄鱼的眼泪”是假的悲伤。此处用动词不定式（to do）表目的，做目的状语，首字母大写。故填To put。
58．
考查名词。句意：简单地说，“鳄鱼的眼泪”是假的悲伤。可知结合提示，应该说简单地说,"鳄鱼眼泪"是假的悲伤。前面是形容词fake，此处应该用名词形式作表语。故填sadness。
59．
考查代词。句意：然后鳄鱼会在那人身上哭泣，但最后还是把他吞了下去。此处指代the man，做宾语用him。故填him。
60．
考查副词。句意：哭泣是完全情绪化的，是留给我们人类的。此处用副词completely作状语，修饰形容词emotional。故填completely。
