during的时态

lmljlzc002

请教：during+一段时间，用什么时态——是完成时还是一般过去时？
比如：
GWD-24-8
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
（答案选c）

bennywang2usa

按理说应该是接一般过去时。不过这个题很特殊。

OG12第86题就是把这个题的数字稍微改动了一下。

miller811

during 可以跟完成时啊 高中时学的