（一题）Mary is his student.She plays the violin very well.(单复变换并改成过去式,将两句合并成一句)
问题描述：
（一题）Mary is his student.She plays the violin very well.(单复变换并改成过去式,将两句合并成一句)
（）（）Mary and Alice（）the（）very well ten years（）.
答
His students Mary and Alice（played）the（violin）very well ten years（ago）.