请求一道语法题解答谢谢。

wangming

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

我从C,D里面选，有人说which不知道在指代谁，就选C，可是我觉得C中的it也不知道在指代谁啊，这怎么解答？

栖叶泠风

这道题我也错过。
我觉得：1.conceive sth as 更地道
            2，D 里面substitute的同位语有歧义，像在修饰private conversation，而且后面的whcih确实指代不清
求大牛们的解答………………

wangming

恩，顶起来，希望牛人解答。非常感谢。

falco

DE选项中的to be和conceived本身就是矛盾的,to be本身表示一种即将发生的事实，但是原文说的是马可尼构想怎么样，这不能确定发生的事情，你能用to be吗？

20082010

D)不单是which的指代问题; a substitute for the telephone 作为它就近名词conversation的同位语，逻辑上是讲不通的。大家做同位语题的时候一定要当心它本身的逻辑是否有问题。

wangming

谢谢大家，请问20082010，C中的IT有没有指代问题？谢谢。

20082010

Marconi conceived of the radio as a tool for private conversation that could substitute for the telephone; instead, it has become precisely the opposite, a tool for communicating with a large, public audience.

可以改写成：
Radio was conceived by M as a tool for private conversation that could substitute for the telephone; instead, it has become precisely the opposite, a tool for communicating with a large, public audience.

这样有没有清楚一点？

wangming

恩，清楚了，但是还有一个问题，which为什么就不能指代radio?他和it在这里我觉得指代问题上讲是一个道理。谢谢你。

20082010

which指代它就近的名词。