其实这题通过时态，必须用现在完成时，就锁定C（排除D/E两项with结构，因为ambiguity），lz问得很好！我个人理解，此处falling作为名词(action noun)理解，就避开了棘手的时态问题。
而且就算用动词fall的某种时态形式，也是
....in its profits, which have increased ... during ... after they ....
这里which从句，which指代profits，然后后面又出来they指代profits，很awkward.
所以就干脆用after falling...falling作为名词，来回避after+从句里面从句的问题，而且这表达很准确很简洁。
不知道这样理解对么，请NN指点
86. The results of the company’s cost-cutting measures are evident in its profi ts, which increased 5 percent during the fi rst 3 months of this year after it fell over the last two years. (A) which increased 5 percent during the fi rst 3 months of this year after it fell (B) which had increased 5 percent during the fi rst 3 months of this year after it had fallen (C) which have increased 5 percent during the fi rst 3 months of this year after falling (D) with a 5 percent increase during the fi rst 3 months of this year after falling (E) with a 5 percent increase during the fi rst 3 months of this year after having fallen 怎么理解此处省略have been ，直接用falling ,有什么依据吗？ -- by 会员 miffyhui (2012/1/14 17:41:25)
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发表于 2012-1-14 17:41:25
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发表于 2012-3-11 13:30:07
