TV-Turnoff Week millions of people around the world participate every year tries to en

问题补充：

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. in which

B. on which

C. which

D. when

解析：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。