Earth Hour started in 2007 in Sydney, Australia, when 2.2 million individuals and more than 2,000 businesses turned their lights off for one hour to take a stand against climate change.The following year, Earth Hour had become a global sustainability movement with more than 50 million people across 35 countries participating.

　　Four of the world's five tallest buildings turned off their lights with the tallest, the 828­metre Burg Khalifa in Dubai, switching off about half a million lights.Also darkening for the occasion were floodlights(泛光灯) at natural wonders such as Niagara and Victoria Falls and Table Mountain in South Africa.

　　【语篇解读】 “地球一小时”活动自2007年开始以来不断发展壮大。今年的活动中，全球超过134个国家和地区的若干城市熄灯一小时，以支持为地球创建可持续发展未来的环保行动。

　　60．Why did the World Wildlife Fund organize the Earth Hour event?

　　A．To create a great view without light worldwide.

　　B．To help with the protection of endangered species.

　　C．To create sustainable resources for future use.

　　D．To call on the whole world to fight against climate change.

　　答案　D　[细节理解题。根据第三段最后一句可知，这一活动的目的是号召政府、组织和个人与气候变化作斗争。

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