It was not until he was seven years old that he went to school请问其中的 he was 可以省略吗,为什么?

分类: 作业答案 • 2022-02-15 14:51:02

问题描述：

It was not until he was seven years old that he went to school
请问其中的 he was 可以省略吗,为什么?

答