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His sister left home in 1998, and_______ ever since.
A.had not been heard ofB.has not been heard of
C.had not heard ofD.has not heard of
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
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