His sister left home in and＿＿since.A. had not been heard ofB. has not been heard ofC

问题补充：

His sister left home in , and＿＿since.

A. had not been heard of

B. has not been heard of

C. had not heard of

D. has not heard of

答案：

A. had not been heard of

(答案→)B. has not been heard of

C. had not heard of

D. has not heard of

解析：考查时态语态，时间是副词since“自从那时”，用现在完成时，而且his sister和hear of是被动关系，所以选B，句意是：他姐姐离开家，自从那时一直没有音讯。