GWD6-Q41

The greatest road system built in the Americas prior to the arrival of Christopher Columbus was the Incan highway, which, over 2,500 miles long and extending from northern Ecuador through Peru to Southern Chile.

1. Columbus was the Incan highway, which, over 2,500 miles long and extending
           
2. Columbus was the Incan highway, over 2,500 miles in length, and extended
           
3. Columbus, the Incan highway, which was over 2,500 miles in length and extended
           
4. Columbus, the Incan highway, being over 2,500 miles in length, was extended
           
5. Columbus, the Incan highway was over 2,500 miles long, extending

     选E,               请问B为什么不对啊?

      谢谢

请高手解答   谢谢

ding

顶

没人吗???

In B, the road system was the highway and (was) extended....

highway (itself) extending from A to B.
highway was extended from A to B.

Two have different meanings.

The first focuses on the condition
The second focuses on the action done by human

可是我怎么觉得E没有主语啊?  请指教 谢谢

能不能出来个高手彻底分析一下这道题

困惑中.......

显然，E选项中的the Incan highway是句子的主语，后面的was是谓语。

前面整个一长串：The greatest...Columbus是同位语，修饰the Incan highway，应该就是这样了

我觉得主要这么两个原因：

1.highway 可以extend,而road system不可以extend

2.同位语优先选择~