He is playing a piece of piano music.We all like listening to it.
问题描述:
He is playing a piece of piano music.We all like listening to it.
合并为一个定语从句
答
有两种不同思路的解答
He is playing a piece of piano music which(that) we all like listening to .
We all like listening to the piece of piano music which(that) he is playing .