求问GWD-21-Q1 只有9天就要考了 遇比较题还是犹豫不定的。。。求NN指点啊！！

pwt930

According to analysts, an alliance between three major personal computer companies and most of the nation’s largest local telephone companies would enable customers to receive internet data over regular telephone lines with speeds much higher than is currently possible.
A.      with speeds much higher than is
B.       with speeds that are much higher than are
C.      at much higher speeds as are
D.      at much higher speeds than that
E.       at speeds much higher than are

这题我选D 嗯 当时没把that看清楚 若是that换成those可以吗？
还有E 后面省略是怎么回事呢？at speeds much higher than （the speeds）are 还是 at speeds much higher than are （the speeds）呢？还是都一样呢？
关于E 还是没想明白这个ARE是哪儿来的。。。than前面也没有ARE丫。。。

求各路战友的思路啊！急死人。。。

bejamin1111

之前讨论的一个链接，可以参考下http://forum.chasedream.com/thread-573829-2-1.html

pwt930

bejamin1111 发表于 2013-4-22 14:14
之前讨论的一个链接，可以参考下http://forum.chasedream.com/thread-573829-2-1.html

谢谢谢谢！！每次都是你救我于苦海！
但关于E的解释还是有点不明白的

“at speeds (which are) much higher than （which）are currently possible.
我理解E选项可以理解后置定语从句作为 SVO than SVO的比较。 省略了主语which，保留动词 are。
而如果是C、D的选项： 应该是宾语Speeds的比较 at much higher speeds than those currently possible. ”

如果这么理解的话 这里第一个which are为什么可以省略呢？