The baby monkey and mother monkey are very happy to see each other 为什么要加to?
问题描述：
The baby monkey and mother monkey are very happy to see each other 为什么要加to?
It is very kind of Kangkang to help them.为什么也要加to?
答
这是固定短语啊 be happy to do sth.很高兴做某事
be kind of sb.to do sth.某人很友善做某事