gwd-4-17

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.

1. as large, integrated companies such as Bethlehem Steel
2. as large, integrated companies, such as Bethlehem Steel, that
3. with large, integrated companies, such as Bethlehem Steel, that
4. while large, integrated companies, such as Bethlehem Steel, that
5. and large, integrated companies such as Bethlehem Steel

答案是b，请教大家了~~

没人理哦...

"，that" 很奇怪呀...

再顶~~

The steel industry has changed radically over the last two decades, as
                            large, integrated companies(主语), such as Bethlehem Steel(插入语,可以不管),
                                that once conducted operations from mining at one end of the process to shipping at the other(定语从句,修饰companies)
                            have greatly downsized(谓语), or in some cases shut down altogether.

TTGWD31套吧，查讨论比较费劲。

还不是很清楚~~as在这里是什么用法呢?

请再指教~~

ps.31套查起来是很费劲~~

刨根问底一句~~

as如果是表比较的话，和谁比呢？怎么看都有点别扭。。。

I just treat "as" meaning "like" here, just to list some examples in complete sentence