prep一题请教斑竹-弱问

smilinggirl1

28(网上讨论)

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 rise and fall 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

 

answer (d) 为何and之前有逗号？

fd983314

答案是D？我觉得是E。是不是in fact和possibly语义矛盾？楼主可以贴一下PREP的解释吗？

[此贴子已经被作者于2007-1-15 17:22:02编辑过]