If he me his telephone number yesterday, I able to ring him up now.
A. told, would be
B. had told, would have been
C. had told, would be
D. told, am
网友回答
A. told, would be
B. had told, would have been
(答案→)C. had told, would be
D. told, am
解析：句意，如果昨天他告诉我他的电话号码，我现在就能给他打电话了。这是一个虚拟条件句，条件从句表示的动作和主句表示的动作发生的时间不一致，所以这是一个错综时间条件句。此时主、从句动词的形式应根据各自所表示的时间进行调整,if条件句是对过去的虚拟，故用过去完成时，而主句是对现在的虚拟，故用 would do形式，故选C。