His speech is ( )[main]about the best way to learn English为什么这里要填mainly be词后面不是要加adj吗?

分类: 作业答案 • 2022-07-14 22:40:01

问题描述：

His speech is ( )[main]about the best way to learn English
为什么这里要填mainly be词后面不是要加adj吗?

答