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
A 考察定语从句。句子的先行词是concert，并在从句中做地点状语，代入从句后，需加介词at，故A正确。