Have you ever dreamed of playing in front of thousands of people at a concert, everyone is

Have you ever dreamed of playing in front of thousands of people at a concert, everyone is clapping and appreciating your music?
A. in which
B. for which
C. from which
D. at which

A. in whichB. for whichC. from which(答案→)D. at which解析：这题考查非限制性定语从句：介词+which引导的定语从句，介词的选择取决于先行词，或者是定语从句的谓语动词的搭配，这句话which指的是concert，在音乐会上用介词at，句意是：你梦想过在音乐会上在成千上万的人面前演奏吗，在音乐会上大家都在为你鼓掌欣赏你的音乐。选D。

这下我知道了