We all know that doing sports is good for our healthWe all know that ____ sports __ good for our health答案是doing和is那为什么要填doing和is呢?
问题描述：
We all know that doing sports is good for our health
We all know that ____ sports __ good for our health
答案是doing和is
那为什么要填doing和is呢?
答
doing sports 是主语
is不是指sports而是指做运动这个事所以是单数