求助一道语法

飞行2010

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
在D,E中选择出错了，答案是E,我选了D. 我感觉虽然D中that指代有点不明确，但是E中的than are。。。这个are的发起者也是不清楚的啊，这里好矛盾，请教牛牛。谢谢。

cannahere

下面是老外的解释，参考一下
看上去 are是对应speeds来着，根据他在B项上的解释，把句子补全了，E可能就变成： at speeds that are much higher than are ...

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
is - singular verb. Speeds - plural subject.

B. with speeds that are much higher than are
that are is redundant (that = speed).
Moreover, Companies receive data at speeds ...
They received us with open arms.

C. at much higher speeds as are
higher....than is correct; higher ...as is not correct.

D. at much higher speeds than that
A verb is required after than to support the phrase 'currently possible' and it should be plural. That would not help in this case.

E. at speeds much higher than are
WINS

飞行2010

谢谢你这么认真的回复。

dengyichao

还是不太懂，补充完整是什么?
at speeds that are much higher than are currently possible speeds?

cannahere

还是不太懂，补充完整是什么?
at speeds that are much higher than are currently possible speeds?

-- by 会员 dengyichao (2010/2/23 22:26:09)

at speeds that are much higher than speeds are currently possible ?
当主语一致时可以省略。
可以参考OG上美国士兵那道题。

dengyichao

应该是，at speeds that are much higher than speeds that are currently possible吧

369966065

at speeds（that are） much higher than （those that）are