GWD-24-8 关于为什么用现在完成时 用它和 during the first three months of this year 有什么必然联系么

kimpossible

The results of the company’s cost-cutting measures are evident in its profits, which increased five percent during the first three months of this year after it fell over the last two years.

A.which increased five percent during the first three months of this year after it fell

B.which had increased five percent during the first three months of this year after it had fallen

C.which have increased five percent during the first three months of this year after falling

D.with a five percent increase during the first three months of this year after falling

E.with a five percent increase during the first three months of this year after having fallen

答案是C  其实可以排除出来C  但是就是想问问 为什么此题用现在完成时

kimpossible

@@   up~~~~~

kimpossible

kimpossible

米人鸟我~~~~~555

brianfang

怎么排除d 和 e 啊

kimpossible

额 其实我就是觉得which在这里很明确指代 profits ，没有指代不清的嫌疑，所以with那些选项都没看了。额

tita

个人认为之所以用完成时是相对于are evident （现在时点）之前持续发生的动作，不过有点疑惑的是C中为什么不用after having fallen，这也是一个相对现在持续的动作。
   已经有前辈讨论过了，所以没人理你，看看这个：http://forum.chasedream.com/GMAT_SC/thread-445069-1-1.html