Question

【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

Answer 1

【答案】B

【解析】句意：他的妹妹1卯8年离开家，自从那时就没有音讯了。由句意和since可知用现在完成时，且用否定结构。