They *** six years ago

题目

They *** six years ago
A,died B,were died C,were dead D,have died.
选什么,died是瞬间动词,应该不行.
而ago又表明要用一般过去式
是什么呢?

答案

They died six years ago
A,died B,were died C,were dead D,have died.
有过去时间 six years ago就用过去时.其它都 不对.
我是从事英语的,不明再问.