PREP上的一道题，谢谢！

kunolan

181. 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.

为什么答案选D，不选E啊···好困惑哦

ktj

ing分词短语放在句尾要么是做主句的状语,表示造成什么结果,要么是修饰最近的词(temperature),这两种情况好象明显都不符合逻辑.

kunolan

谢谢了