The eyes of the elephant seal adapt to darkness more quickly than any other animal yet tested, thus allowing it to hunt efficiently under the gloomy conditions at its feeding depth of between 300 and 700 meters.


The eyes of the elephant seal adapt to darkness more quickly than any other animal yet tested, thus allowing it

The eyes of the elephant seal adapt to darkness more quickly than does any other animal yet tested, allowing them

The eyes of the elephant seal adapt to darkness more quickly than do those of any other animal yet tested, allowing it

Because they adapt to darkness more quickly than any other animal yet tested, the eyes of the elephant seal allow it

Because the eyes of the elephant seal adapt to darkness more quickly than do those of any other animal yet tested, it allows them

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题目分析：

本题考点鲜明，也不算难。只不过整个题目的谓语动词adapt不太明显，容易让人在读句子的时候一时错过谓语动词。另外，any other animal身后的yet tested是一个过去分词短语，做定语修饰any other animal。


选项分析：

A选项：比较对象应该是“象海豹的眼睛适应黑暗的情况”和“其它动物的眼睛适应黑暗的情况”，因此，than后应改为：those of any other animal yet tested do（those表示eyes，do表示情况，即，adapt）。

B选项：比较对象错误同(A)；them的指代对象只能是复数名词，但是逻辑上allow的宾语应该是the elephant seal，是单数名词。

C选项：Correct. 本选项在语法和逻辑上均是正确的。

D选项：比较对象错误同(A)。

E选项：代词it和them的指代对象均有错误，原理上同(B)。

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