gwd 21-1

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)

E. at speeds much higher than are

请问，D为什么错？

E是从下面的句子省略来的吗？：

at speeds (that are) much higher than are currently possible (speeds)

快考了，请NN和版主出手相助，谢谢！

at speeds (that are) much higher than  (speeds)　are currently possible这样才平行

D. at much higher speeds than that  

E. at speeds much higher than are　ＤＥ的的比较对象不同，楼主仔细体会一下，如果用Ｄ的形式，那应该是at much higher speeds than at ......；而Ｅ只是对形容词high的比较。

niu MM,多谢！

理解了～

我想请教 猫猫 ：

are 可以省略吗？

E. at speeds much higher than are

28.   The rise in the Commerce Department’s index of leading economic indicators suggest that the economy should continue its expansion into the coming months, but that the mixed performance of the index’s individual components indicates that economic growth will proceed at a more moderate pace than in the first quarter of this year.

98.   The financial crash of October 1987 demonstrated that the world’s capital markets are integrated more closely than never before and events in one part of the global village may be transmitted to the rest of the village—almost instantaneously.

((D) more closely integrated than ever before and that253.

Analysts blamed May’s sluggish retail sales on unexciting merchandise as well as the weather, colder and wetter than was usual in some regions, which slowed sales of barbecue grills and lawn furniture.

(B) which was colder and wetter than usual in some regions, slowing

从以上OG几个题看，我认为are是可以省略的。

猫猫真好，有机会请你吃鱼。

請問一下，這裡的than的角色是否是關代(跟as....as當關代的用法一樣？)

不確定.......向牛們請教！

help!!!!!!!