Earth Hour started in Sydney on March 31st, 2007. It calls on families and buildings to tu

Earth Hour started in Sydney on March 31st, 2007. It calls on families and buildings to turn off the lights from 20:30 to 21:30 on the last Saturday night of March. In 2007 more than 2.2 million homes and businesses turned off their lights. 【小题1】 And it was supported by 50 million people from thirty-five countries. On March 28, 2010 over 2100 cities in another eight countries took part in it. 【小题2】
In 2012 in China, there were many cities taking part in this activity, especially some large cities, such as Beijing, Shanghai.... In those cities, many people turned off lights in the hour. 【小题3】 In colleges some students held some activities to make all the students leave their dormitories.
It was 20:30, Beijing time. In Beijing some people were taking a walk with their families or friends. 【小题4】 And in Ningbo some young people were holding a party in a park,singing and dancing. The people from the three cities felt very relaxed.Earth Hour has a variety of activities, but the final goal is the same. That is focusing on (聚焦) climate change and protecting the environment for individuals.
A. Many people would feel bored without lights.
B. Earth Hour came to China on that day, too.
C. And without lights, they could also enjoy themselves.
D. In Shanghai some people were having a nice talk with their friends.
E. A year later, on March 29, 2008 Earth Hour became a global activity.
E

(答案→)E 解析：文章讲述了地球一小时活动的相关历史背景和参与的情况。【小题1】从后文And it was supported by 50 million people from thirty-five countries，可知前文应为地球一小时活动成为了全球的活动，故选E【小题2】从后文In 2012 in China, there were many cities taking part in this activity,可知，前文应该讲中国，故选B【小题3】从后文In colleges some students held some activities to make all the students leave their dormitories.可知，前文应该讲没有电时一样可以做一些事情来玩过非常开心，故选C【小题4】前文讲到In Beijing some people were taking a walk with their families or friends.北京的人们一些情况，后文讲到宁波人们的情况，所以此处应该为上海人们的情况，故选D

就是这个解释