白勇6-29

Once the economic and social usefulness
of the motor car was demonstrated and with its superiority to the horse
being proved, much of the early hostility to it in rural regions disappeared.

      (A) and with its
superiority to the horse being

      (B) and its
superiority over the horse had been

      (C) and its
superiority to the horse

      (D) its
superiority over the horse（C）

      (E) with its
superiority to the horse having been

给出的答案是B。对这道题目中的C选项，白勇是这样解释的：and连接once从句和名词短语its superiority，两者形式不对称。

但我认为白勇这样的解释很牵强。

1、按照白勇的如上解释，那么从对称的角度，B项的once从句和its superiority也不对称。

2、B项中的时态had been似乎不合理，因为从句子分析来看，应该不可能是过去完成时。

3、白勇在第二章关于并列结构的省略中很清楚的提到：两个句子并列，第一个句子含有be动词，第二个句子中的be动词必须省略。并举例：Once the economic and social usefulness
of the motor car was demonstrated and its superiority to the horse （此处省略was）proved,....

这道有点莫名其妙的题名已经让我困惑万分，请NN解释！

这个怎么不是过去的过去呢,

如果车的社会和经济用处被阐明,相对于马的优越性被证明,那么早期在农村对车的反对就会消失.

证明显然是在消失之前,消失是过去,所以.........