问题
选择题
TV-Turnoff Week, _______ millions of people around the world participate every year, tries to encourage people to turn on life.
A．in which
B．on which
C．which
D．when
答案
答案：A
这题考查定语从句，先行词是TV-Turnoff Week，定语从句中缺少时间状语，句意是：全世界很多人参与的远离电视周是想鼓励人们转向生活。选A。