You could have seen Fang Zuming yesterday morning.A. did you comeB. if you cameC. had you

问题补充：

You could have seen Fang Zuming yesterday morning.

A. did you come

B. if you came

C. had you come

D. if you should come

答案：

A. did you come

B. if you came

(答案→)C. had you come

D. if you should come

解析：句意：如果你昨天早晨来，你就会看到房祖名。对过去情况的虚拟，条件句中用过去完成时，主句用would/should/might/could + have + 过去分词，虚拟条件句中有had, should, were时，可以将if去掉，然后把had, should, were提到主语前面，选C。