The couple decided to adopt the child whose parents in an accident.
A. had been killed
B. are killed
C. had killed
D. killed
网友回答
(答案→)A. had been killed
B. are killed
C. had killed
D. killed
解析：考查时态和语态。句意：那对夫妻决定收养这个父母在事故中去世的孩子。根据惊讶可以孩子的父母是在事故中北杀死的，应该使用被动语态。另外被杀死是在孩子被收养之前，应该使用过去完成时的被动语态。故A正确。