问题
选择题
His sister left home in 1998, and_______ ever since.
A．had not been heard of
B．has not been heard of
C．had not heard of
D．has not heard of
答案
答案：B
考察时态语态。根据句意可知，sister与hear of之间是被动关系，根据since可知，要用现在完成时
句意为，他的姐姐在1998年离开了家，并且自从那时就没有她的消息了