18.Five people were reported

网友回答

report sb to do sth 报道某人做某事,后面要用to do 的形式,五个人这次意外中是被杀死的,要用被动语态,而且此事已发生完毕要用完成时,所以答案是D
======以下答案可供参考======
供参考答案1:
第三人称描述，report已经用了过去式，所以kill用过去完成式
供参考答案2:
18.Five people were reported ________ in the accident.
A. to be killed B. to