求助涛涛--09--41

Q41.

Marconi’s conception of the radio was as a substitute for the telephone, a tool for private conversation; instead, it is precisely the opposite, a tool for communicating with a large, public audience.

1. Marconi’s conception of the radio was as a substitute for the telephone, a tool for private conversation; instead, it is
2. Marconi conceived of the radio as a substitute for the telephone, a tool for private conversation, but which is
3. Marconi conceived of the radio as a tool for private conversation that could substitute for the telephone; instead, it has become
4. Marconi conceived of the radio to be a tool for private conversation, a substitute for the telephone, which has become
5. Marconi conceived of the radio to be a substitute for the telephone, a tool for private conversation, other than what it is,

the answer is E but i saw that of the other version is C. which one is right?

i do not think that conceive of sth to be is a proper usage to word conceive. And " it" in C  appropraitely referred to the radio. Thus i prefer C

appreciation for help 

C里的that从句指代不明确,而且那个instead一般不那么用吧,一般是放在句末

that 是指代前面的 tool，instead 有这样用过的，我不记得了，好像是大全还是gwd里出现过的

I prefer C.  "Perceive ... as..." is in my ken and notes.

I have question on E:  do you think "other than what it is, precisely..." is wrong on gramma or on GMAT preference?

Thansk.

Lucy