又是逢做必错题目……

arieslee0410

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.

A.    Marconi’s conception of the radio was as a substitute for the telephone, a tool for private conversation; instead, it is
B.    Marconi conceived of the radio as a substitute for the telephone, a tool for private conversation, but which is
C.    Marconi conceived of the radio as a tool for private conversation that could substitute for the telephone; instead, it has become
D.    Marconi conceived of the radio to be a tool for private conversation, a substitute for the telephone, which has become
E.    Marconi conceived of the radio to be a substitute for the telephone, a tool for private conversation, other than what it is,
请问这题的考点是什么啊？？？求解答~~

sdcar2010

It test your knowledge of the idiom: conceive of sth. as sth.