帮忙分析下

hopr999

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.

B. and its superiority over the horse had been

C.and its superiority to the horse

答案是B，但是如果我把and ……看作是和once……demonstrated并列的，那么在并列句里是一定要省略Be的，所以我觉得C是真确的。大家的意见呢？

sammen

对这里并列是对的，但是你省略了been直接的后果就是本来被动变成了主动，导致句子意思变化了，我们且不说是不是对，就意思改变是ETS的大忌。