His uncle went abroad in 2010, and since.
A. had not been heard of
B. has not been heard of
C. had not heard of
D. has not heard of
网友回答
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：
试题分析:句意：他叔叔在2010年出国，从那以后就没了音讯。句中出现的since是现在完成时态的标志词，根据句意判断his uncle和hear of是被动关系，故答案选B。