Whatwouldhavehappened,

问题详情：

What would have happened, ______, as far as the river bank?

  A. Edward Snowden had walked farther             B. if Edward Snowden should walk farther

  C. had Edward Snowden walked farther             D. if Edward Snowden walked farther

【回答】

C

知识点：虚拟语气

题型：选择题