Question

【题目】What would have happened, ___________, as far as the river bank?

A． Bob had walked farther

B． if Bob should walked farther

C． had Bob walked farther

D． if Bob walked farther

Answer 1

【答案】C

【解析】此题表示与过去事实相反的假设，主句用would have done,从句用had done,此处用了倒装的省略形式,即省去if, had提到句首。故选C。