请教一题GWD语法题

henguc

The steel industry has changed radically over the last two decades, as large, integrated companies such as Bethlehem Steel once conducted operations from mining at one end of the process to shipping at the other have greatly downsized, or in some cases shut down altogether.
A.as large, integrated companies such as Bethlehem Steel
B.as large, integrated companies, such as Bethlehem Steel, that
C.with large, integrated companies, such as Bethlehem Steel, that
D.while large, integrated companies, such as Bethlehem Steel, that
E.and large, integrated companies such as Bethlehem Steel
正确答案B
请问ACDE分别怎么错的啊？

winnielxx

看见后面的 have greatly downsized, or in some cases shut down了么   这是

句子的谓语

所以 前面的conducted 只能是个修饰结构中的动词  因此AE排除BTopway的区别只有一个词  

首先 可以排除C 因为我们需要一个连词 with是个介词 不能够连接句子

然后 我们看意思 钢铁行业在过去的二十年发生巨变，接下来说的是 大公司精简，或关闭  那么 while 这个转折就不行 排除D

xiaohaotoutou

请教NN，为啥D是错的呢？while和as都可以表当一个……的时候，另外一

个……发生。为什么while不对呢？

louisehu

while表示同时或者转折

这里产生了歧义（到底是哪个意思？），就算你说只有同时这个意思说的过去

它的意思也没有正确选项的as来的切合句意，表示随着

多理解理解