Question

【题目】What would have happened,___as far as the riverbank?

A.Bob had walked farther

B.if Bob should walk farther

C.had Bob walked farther

D.if Bob walked farther

Answer 1

【答案】C

【解析】由would have happened可知，这是与过去事实相反的虚拟语气，条件句应用过去完成时。答案C是省略if后变成的倒装句。