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
考察时态。根据前一句可知他叔叔2010年出国，本题的关键词是since,这里是指出国以后就没有被听说过。
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