Section 10 15题 新东方补充资料

iamf

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

The answer is: and its superiority to the horse

My answer: and its superiority over the horse had been

Referring to the dictionary, I found that the prep added after superiority is "over"..

zhouyang1999

the key issue is : no passive voice can be used on wordrove, to be proven is unidiomatic. superior to is idiomatic and origin answer is better.

Louisa_xy

proved用的就是被动语态，省略了was

"and its superiority over the horse had been"-- had been时态不对

VICTOR_JZG

以下是引用Louisa_xy在2003-1-14 8:55:21的发言：
proved用的就是被动语态，省略了was

"and its superiority over the horse had been"-- had been时态不对

Agree with you!