问大家一道GMAT语法题

题目

问大家一道GMAT语法题
Computers are becoming faster,more powerful,and more reliable,and so too are modems,they are the devices to allow two or more computers to share information over regular telephone lines.
(A) so too are modems,they are the devices to allow
(B) so too are modems,the devices that allow
(C) so too modems,the devices allowing
(D) also modems,they are the devices that allow
(E) also modems,which are the devices to allow
请问C选项中如果改成so too are modems,the devices allowing...是不是正确呢?

答案

可以的
这个题的语法错误在于Grammatical construction+Rhetorical construction
C的错误在于少了are 后面的that allow 或者allowing都对
OG上关于的解释是:
(1)C项的错误在于:
Verb "are" is necessary to make this a main clause
(2)关于allow:
"To allow"is not an idionatic way to modify device; either "that allow" or "allowing " would be correct
LZ你没有看OG吗?这是OG11,10页上的18题,仔细看看OG,比我解释得更详细的