prep2-170 之前有讨论帖，但是对C还是有疑惑

sires_0

171.      (24676-!-item-!-188;#058&001022)       (GWD-10-Q2:GWD-11-10)
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,
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正解为C。看了之前讨论的帖子明白其他选项的错误了，但是对C依然有疑惑，望大家一起再来讨论论一下。
1.如果it指代the radio 的话，岂不是违背了就近指代原则？我认为从语义上it应该指代the radio as a tool for private conversation，这样才和宾语the opposite意思上对应啊。M把radio 当作a tool for private conversation，但其实radio 应该是a tool for communicating with a large, public audience。M的观点和事实恰恰相反
2.it has become为什么要用完成时？原文没有明确的时间状语暗示应该用完成时
3.a tool for private conversation that could substitute for the telephone中that难道没有指代private conversation 的嫌疑吗？

[此贴子已经被作者于2009/7/28 21:03:48编辑过]

jbc88

B中的which能指代the telephone吗？