[求助]GWD21-Q1~关于有省略的比较

GWD21-Q1:

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

答案是E，我选了D...at much higher speeds和at speeds much higher为什么选后者？

还有就是than后面的怎么选呢？是否是两个速度在比较？而E中后面难道是解释成than speeds that are currently possible？？晕啊，这种有省略的比较怎么看啊...?

同问！！求nn解答

A.    with speeds much higher than is

B.    with speeds that are much higher than are
               一定要用at speeds

C.    at much higher speeds as are

D.    at much higher speeds than that  是速度在比較，speeds是複數，應該用those

E.     at speeds much higher than are  省略：at speeds (that are) much higher than speeds that are currently possible

          當同一個物件自己在不同的時間比較時，than 後面可以省去主詞。
至於動詞可不可以省略，要看比較的時間是怎樣的

up~~~

我的问题是：

D.    at much higher speeds than that  是速度在比較，speeds是複數，應該用those
            

如果D选项是at much higher speeds than those是否正确？我觉得much higher speeds 和speeds much higher还是不一样的。请指点。

如果D选项是at much higher speeds than those是否正确？我觉得much higher speeds 和speeds much higher还是不一样的。请指点。

ding