请教：TTGWD-4-Q17

Q17:

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

答案是B。为什么选B，其它又错在哪里？谢谢！

LZ的题目是不是有写错的地方.

Q15: TTGWD4-Q17:

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

 题目没错，同问，我选了D,

没选B，因为一眼，看到as，又是such as的一下就排除了B，哪位牛人说说while，为啥不如as？

as  和such as  在一起用，有多少人是和我一样，首先就给排除掉了？

觉得ETS真是挖好坑让我跳。。。。可恨!

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