在音乐课上，老师教我们唱了一首古老的民谣《绿袖子》。

In music class, the teacher taught us to sing the old folk song ___Greensleeves.

许多现代歌曲都以绿袖子这首古老旋律为基础重新编曲。

Many modern songs are rearranged based on the ancient melody of ___Greensleeves.