Question

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

Answer 1

A

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。