The steel industry这道题求解

缺氧

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


答案选B，但为什么不选E？B中的第一个as是作为的意义还是“像。。。”的意义啊？求助

sdcar2010

as = when

E is wrong because it contains three verbs: conducted ... have greatly downsized, or.. shut down.

缺氧

哦，明白了，谢谢你