His sister left home in 1998, and_______...

His sister left home in 1998, and__________ 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】句意为：他的妹妹在1998年离开家，自从那时就没有音讯了。用现在完成时的否定结构。

考点分析：

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