问题补充：
I didn’t know his address yesterday, otherwise I him a visit.
A. would pay
B. would have paid
C. paid
D. had paid
答案：
A. would pay
(答案→)B. would have paid
C. paid
D. had paid
解析：考查虚拟语气。陈述句，+otherwise+虚拟语气；根据前面一句话可知，是与过去是相反，所以主句中应是would have done.
