问题
选择题
My friend, Tom, left New York in 1976 and since then.
A．hadn’t been heard of
B．hasn’t been heard of
C．hasn’t heard of
D．hadn’t heard of
答案
答案：B
考查时态。根据句中时间状语since then自从那时起，可知用现在完成时，句中主语与hear of听说之间为被动关系，故选B。