Question

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

B

解析:

C、D是主動語態(tài)，hear of表示“聽說”，后面應該有賓語。前句意思是“他妹妹1998年離開的家”，說明1998年前有音信，由此可判斷下句意思是“她妹妹從1998年到現(xiàn)在以來才沒有音信的（被聽說過）”，因此是現(xiàn)在完成時態(tài)。