关于介词,The ice is thick enough to walk on.The book tells us a lot.为什么a lot后面就把of省略了,而on还留着?

分类: 作业答案 • 2022-06-07 18:35:14

问题描述：

关于介词,
The ice is thick enough to walk on.
The book tells us a lot.
为什么a lot后面就把of省略了,而on还留着?

答