急,马上要考了,求助PREP181

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.

答案是D,但E为什么错呢?E中最后不能表伴随吗?

不是NN，试着解释一下。尽管我也选了E

两点：

1。用来做thermometer的，是 the number of chirps ，而不像一般题目里面说得是整句句子做主语

2。can在这里不能省略吧，possibly和can的愿意也不一样

大家讨论

窃以为:

应该和serving修饰的对象有关，E不能清楚地表现出是什么serving

支持这句

谢谢.有点明白了

看来关键是can