What a pity! joined in the party, I would have met my old friend．
A. lf I have
B. Had I
C. I had
D. Have I
网友回答
A. lf I have
(答案→)B. Had I
C. I had
D. Have I
解析：考查if条件状语从句的虚拟语气。根据would have met可知指的是过去的情况，所以if从句要用过去完成时态，且if的虚拟语气中，可以将助动词had,were或shluld提到句首，省略if。所以选B。