GWD-TN的一道题，关于as 与 while....

modteen

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

这里答案是B，但跟D有什么区别？

太阳狮子

这里引导的不是时间状语从句

morningjay

这里的AS是作为的意思，是介词。as large, integrated companies，large和intergrated都是用来修饰companies的。个人看法，不知是否正确。。

morningjay

changes......that ...from...to...

而当中那个只是插入了个例子

modteen

谢谢LS，但我不认为你是对的。

aeoluseros

while放句中表对比转折或者当...时。

这里应该是as引出原因状语从句。