1. Mozart's father was a musician employed at a noble's court who was teaching his son to sing and play almost before he could walk.
    莫扎特的父亲是个受雇于贵族宫廷的音乐家，他在儿子还不会走路时就教他唱歌、弹奏乐器。

2. On the roof of the schoolhouse some pigeons were softly cooing, and I said to myself, "Will they, too, be obliged to sing in German?"
    教室的屋顶上，几只鸽子在咕咕咕地轻声叫着，我心想：“会不会叫鸽子唱歌也用德语？”

3. Let´s sing some songs to celebrate this joyful occasion.
    让我们唱几支歌来庆祝这个令人欢乐的节日。