第三部分阅读理解(共20小题；每小题3分，满分60分)
阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项，并在答题卡上将该项涂黑。
A
Did you turn off your lights from 8:30 pm to 9:30 pm on March 28? Perhaps you invited your parents and neighbors to join the worldwide event—Earth Hour?
Liao Mingyu，17，from Shenzhen Experimental School，is glad that she and a group of other students from eight high schools in the city jointly(共同)made the event even bigger by inviting more citizens to take part．
It all started with an idea to design ways of saving energy after Tree-Planting Day．The students，who are all members of the Environmental Protection Union in their own schools，decided to help raise people’s awareness of global warming as the Earth Hour campaign(行动)approached．
