Today is kangkang's birthday,kangkang and his friends are having a birthday party .Jane is singing an English song.She can sing very well now,but one year ago she couldn't do it at all.Mariais play the piano,she can play the piano very well now .But when she was six ,she could play the pianojust a little .Then Michael perform magic tricks for us.He could not do it before ,but he can perform magic tricks now.They are all very happy.

你看行吗?