The couple decided to adopt the child whose parents in an accident.A. had been killedB. ar

问题补充：

The couple decided to adopt the child whose parents in an accident.

A. had been killed

B. are killed

C. had killed

D. killed

答案：

(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。