[求助]GWD上的一道题，没找到讨论链接

由于没找到这道题的讨论链接，所以把它贴上来了哈。麻烦大家指点指点。是GWD上的题。

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,

   Answer: E

GWD上给的答案是E.可是我总觉的E后半句“other than what it is, recisely the opposite, a tool for communicating with a large, public audience”有点不完整。我觉得C更为合理。

大家给点意见哈。谢谢~~.

我认为有两点：

1）时态问题，前面是一般过去时，后面表达转折 ，没有理由用现在完成时 has become,现在完成时在有明显的标志下才能使用

2）平行问题，a substitute for the telephoema tool for private conservation 与 未划线部分的a tool for communicating with ...构成了平行关系，   而C 中 a tool for private conservation that could...无法与后面构成平行结构

一点愚见哈