He called to tell me that you are in hospital otherwise I nothing about it.A. had knownB

问题补充：

He called to tell me that you are in hospital, otherwise I nothing about it.

A. had known

B. wouldn’t have known

C. would know

D. would have known

答案：

A. had known

B. wouldn’t have known

C. would know

(答案→)D. would have known

解析：句意：他打电话告诉我,你在医院，否则我根本就不知道。这里的otherwise相当于一个虚拟条件句=if he had’t called to tell me that you are in hospital,所以是和过去相反的虚拟语气，主句用would have done，而且根据意思应该是肯定，所以选D。