prep-1-96

96.   (29707-!-item-!-188;#058&003977)

In some species of cricket, the number of chirps per minute used by the male for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve as an approximate thermometer.

(A) for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve

(B) for attracting females rises and falls in accordance with the surrounding temperature, which can in fact serve

(C) in attracting females rise and fall in accordance with the surrounding temperature, in fact possibly serving

(D) to attract females rises and falls in accordance with the surrounding temperature, and it can in fact serve

(E) to attract females rises and falls in accordance with the surrounding temperature, in fact possibly serving

The answer is D.

为什么E 的 "in fact possibly serving" in fact possibly serving不好？是不是因为这样既修饰rises又修饰falls，所以不好？

首先，can 和 possibly的意思不同。

第二，serving现在分词表伴随发生，illogically.

谢谢laipiyu和AlienX!

请问哪里illogically了? "又升又降,serving着一种XXX功能" - 我觉得好象logical的么.

同问E为什么没有D好？

D中的it指代什么？

1.动词优先于动名词。

2.此处动名词的使用也不符合规则，比如with doing + n.

96.   (29707-!-item-!-188;#058&003977)

In some species of cricket, the number of chirps per minute used by the male for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve as an approximate thermometer.

(D) to attract females rises and falls in accordance with the surrounding temperature, and it can in fact serve

(E) to attract females rises and falls in accordance with the surrounding temperature, in fact possibly serving

...rises and falls (verb)..., serving as an approximate thermometer (noun.)

E is incorrect because of the wrong logical prediction! How can verbs serving as a noun?