Did you sing a song Yes,i sing.I sang a chinese song 划线部分哪里错了?A是（Did you sing a song
A是（Did you sing a song）里的song B是(Yes,i sing.I sang a chinese song )l里的sing
C是(Yes,i sing.I sang a chinese song )里的sang D是(Yes,i sing.I sang a chinese song )里的chinese