Imagine what today's life would be like if Alexander Bell__ the telephone more than 130 years ago.

分类: 作业答案 • 2021-12-29 14:42:33

问题描述：

Imagine what today's life would be like if Alexander Bell__ the telephone more than 130 years ago.
应填didn't invent 还是填一个过去完成时

答

hadn't invented
过去完成时