Question

求解GMAT语法题目.

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.

Answer 1

A. The eyes of the elephant seal adapt to darkness more quickly than any other animal yet tested, thus allowing it
than后面接的是名词animal，比较对象是前面的名词eyes，不是同一类别的事物无法比较
B. The eyes of the elephant seal adapt to darkness more quickly than does any other animal yet tested, allowing them
than后面接的是句子animal does,比较对象是前面的句子eyesadapt，逻辑上是眼睛和动物比，比较对象不成立；them只能往前指代复数名词eyes，但眼睛不能狩猎，代词使用错误
D. Because they adapt to darkness more quickly than any other animal yet tested, the eyes of the elephant seal allow it
they作为从句的主语，优先指代主句主语eyes，单复数一致，语法上有指代对象，但语义上eyes无法和animal比较；主句的语义是眼睛本身使得海象狩猎更容易，不符合逻辑，应该是海象的眼睛能够更快地适应黑暗使得他能够更高效地狩猎
E. Because the eyes of the elephant seal adapt to darkness more quickly than do those of any other animal yet tested, it allows them
it作为主句的主语，语法上优先指代从句主语，但从句主语是复数的eyes，无法被单数的it指代，因此指代从句的宾语darkness，但语义错误；语义上，it指的是because这句话，是因为海象的眼睛对黑暗适应得更快，所以他狩猎很有效率，但GMAT中代词不能指代句子。