问题
选择题
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
答案
答案：A
题目分析：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。