You could have seen Fang Zuming yesterday morning.
A. did you e
B. if you came
C. had you e
D. if you should e
网友回答
A. did you e
B. if you came
(答案→)C. had you e
D. if you should e
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。