Have you ever dreamed of staging a concert, thousands of people are applauding and appreciating your music?
A. at which
B. when
C. for which
D. which
网友回答
(答案→)A. at which
B. when
C. for which
D. which
解析：句意：你有没有梦想过站在音乐厅的舞台上，成千上万的观众欣赏你的音乐，并且为你鼓掌？这里含有一个非限制性定语从句，关系词指物，用which，且介词和前面的先行词构成固定搭配，用at，选A。