His sister left home in 1998, and since then. A. had not been heard of B. has not been ——青夏教育精英家教网—

摘要： His sister left home in 1998, and since then. A. had not been heard of B. has not been heard of C. had not heard of D. has not heard of

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His sister left home in 1998 and ________ since then.

A．had not been heard of B．has not been heard of

C．had not heard of D．has not heard of

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