问题
选择题
In thousands of cities and towns, lights for Earth Hour Movement on March 29 this year.
A. stayed up
B. went out
C. tried on
答案
答案：B
题目分析：stayed up熬夜，不睡觉；went out出去，熄灭；tried on试穿，尝试。句意：今年三月二十九日，在成千上万的城镇中，为了响应地球一小时活动，所有的灯都熄灭了。故选B。