His sister left home in 1998, and ________ since. [ ]

A. had not been heard of

B. has not been heard of

C. had not heard of

D. has not heard of

零售业务和对公业务联动营销主要有（）几种模式。

A.法人客户联动营销个人客户模式

B.个人客户牵引营销法人客户模式

C.公私联动与法人客户建立战略联盟关系的模式

D.社区联合营销模式