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【题目】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

【答案】B

【解析】

试题分析:考查时态。句意;他姐姐在1998年离开了家,从那以后就再也没有被听说过。根据本句中的副词since可知使用现在完成时,根据句意说明使用否定句,故B正确

考点 : 考查时态

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