11.唱首歌 = Sing a song 唱首歌--Sing a song 13.Sing a song 唱歌 (Sing a song) 唱首歌——唱首歌sing a song 10.爱是一首歌 = Love is a song sing a song 唱歌歌（Sing a song） 04.Sing a song 07.Sing a song