The floor _____(shake)slightly when she walked across the room.划线部分是填was shaking还是shook,为什么?

分类: 作业答案 • 2021-12-19 11:46:43

问题描述：

The floor _____(shake)slightly when she walked across the room.
划线部分是填was shaking还是shook,为什么?

答