GWD37-19

kevin1473

GWD四十套题中的37-19：
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

D、E犹豫了一会后，选的E，因为考虑到D中的it指代有歧义的可能（指代number或者temperature)
可是答案是D，请大家指教！

poppy9696

我语法不好， 瞎猜一下。

D, E 语法好像都对， 是不是in fact 和possibly矛盾？

20082010

尽量避开和原意有出入的副词，原本的A)选项中并没有possibly的意思，E错。D中的it在指代number.