His sister left home in 1998, and_______...

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

B 【解析】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

考点分析：

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