His uncle went abroad in 2010, and since.A. has not been heard of B. had not been heard of

His uncle went abroad in 2010, and since.
A. has not been heard of
B. had not been heard of
C. had not heard of
D. has not heard of

(答案→)A. has not been heard of B. had not been heard ofC. had not heard ofD. has not heard of解析：考查时态和语态。Since后跟过去时间，句子用现在完成时态。而且His uncle和hear之间是动宾关系，所以用被动语态。选A。

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