Jane would never have gone to the party ____ that Mary would come to see her.   [ ]

A. has she known                  

B. had she known  

C. if she knows                 

D. if she has known

（）曾经说过，“没有落后的国家和地区，只有落后的管理”。

A、德鲁克

B、弗雷德里克•泰勒

C、赫伯特•西蒙