问一个PR模考上的题目

princess

At the time of the Civil War, most of the weaponry used [/U]differd littlefrom that which had been widely used during[/U]the previous 100 years.

划线部分是正确选项，另有一选项为
differd littlefrom that which had been widely used in

请问during 和 in有什么区别？为什么这儿要用during 呢？
谢谢：）

z_weining

had been 是完成时，如果是一般时，那就应该是两种都可以了。
因为during强调过程。

我也是凭记忆的，没翻语法书哦：）

princess

因为如果时间状语是 in the past few years,主句也应该用完成时啊。所以想不通哪

zyh79

“in the past few years,主句也应该用完成时”
不对，这个问题有人纠正过。
有这么一个句子
T23.A labor Department study states that the numbers of women employed outside the home increased by more than thirty-five percent in the past decade and accounted for more than sixty-two percent of the total growth in the civilian work force.
本句得从句部分是陈述过去得某个事实，不用一般过去时，用现在完成时
用现在完成时只是用来强调动作完成后的结果和状态

princess

我记得这是初中的语法

我看了一下23题，五个选项中没有用完成时的

对于我说的（in the past/last few years），其实OG上也有支持的例子
178. In the last few years, the number of convicted criminals given community service sentences allowing them to remain unconfined while performing specific jobs that benefit the public has risen dramatically.
不过这个选项中都用的是完成时，看了ETS是不会考察这个语法点的

z_weining

其实我最害怕的就是用时态来判断，尤其是过去完成和过去。

这道题，如果真的考我了，我就猜，哈哈，毕竟还能二选一嘛！：））

cook

"因为如果时间状语是 in the past few years,主句也应该用完成时啊。所以想不通哪 "
Whether it should use 现在完成时?.