section 2 notes to difficult sentences from unit 5 musics 1. have you ever dreamed of playing in front of thousands of people at a concert, at which everyone is clapping and appreciating your music? 你梦想在成千上万的人面前举办音乐会，人人都为你喝彩，赞颂的音乐？本句at which 引导的是非限制性定语从句，可以改写为：have you ever dreamed of being in front of thousands of people at a concert, with everyone clapping and appreciating your music?
