请教gwd两道题目

gmatziyu

1. 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
Answer: E
b和d为什么错呢？
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2. GWD-18-Q11
In no other historical sighting did Halley’s comet cause such a worldwide sensation as did its return in 1910-1911.
A. did its return in 1910-1911
B. had its 1910-1911 return
C. in its return of 1910-1911
D. its return of 1910-1911 did
E. its return in 1910-1911
Answer:a
c为什么不对呢？
谢谢！

JayNicholas

1    b:  with这个介词在这里用错了
     d:  that作为代词后面直接加possible 没有谓语动词

JayNicholas

2   分析一下结构就是
comet cause such a worldwide sensation In no other historical sighting 以及 its return did in 1910-1911

did 指代 cause     介词短语在句首句子倒装  所以 did 提前  那么A就对了

gmatziyu

thanks!