问题
选择题
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
答案：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。