UC知道答案是B.告诉我原因,详细点啊谢谢
来源：百度知道 编辑：UC知道 时间：2024/06/20 02:09:11
答案是B.告诉我原因,详细点啊谢谢
in september 2008 ,China's key milestone in space travel _____ when zhai zhigang conducted the space walk.
A reached B was reached C has reached D had been reached
in september 2008 ,China's key milestone in space travel _____ when zhai zhigang conducted the space walk.
A reached B was reached C has reached D had been reached
太空行走的里程碑（milestone in space travel）不是自己达到的 当然要用被动语态 这样就排除A和C 再看D 过去完成时不恰当 用过去完成时就必须要在句子中还出现了别的过去时间点或过去的动作 并且这两个动作有明确的先后关系 但句子中没有 所以如果是一般完成时也对
所以B是最佳答案