答案：Earth Hour is a global event organized by WWF and is held between 8:30 p.m. and 9:30 p.m. on the last Saturday of each March, asking people to turn off their non-essential lights for an hour. First held in Sydney in 2007, Earth Hour aims to remind people of the influence of global warming and to raise awareness about environmental protection. This year more than 100 million people from 125 countries took part in the event on March 27. Although the event has grew in popularity, some people still doubt whether it really contributes to saving energy and decreasing carbon emission, proposing that we should do more than just turning off our lights. As a matter of fact, turning off our lights for just an hour is not enough to save our planet, but it is a meaningful step in the right direction.
试题分析：本文属于正反观点类的议论文，讨论的话题是“地球一小时”；要求同学们就此观点做出自己的选择并说明理由，本作文中给出的要点比较具体,故需要准确表达.写作时注意准确运用时态，上下文意思连贯，符合逻辑关系，尽量使用自己熟悉的单词句式，同时也要注意使用高级词汇和高级句型使文章显得更有档次。特别注意在选择句式时要赋予变化。 【亮点说明】范文中运用一些常见的短语turn off关；raise awareness about提升对，，的意思；As a matter of fact, turning off事实上；Earth Hour is a global event organized by WWF这个句子中organized是分词做后置定语用来修饰event；Although the event has grew in popularity, some people still doubt whether it really contributes to saving energy and decreasing carbon emission, proposing that we should do more than just turning off our lights.这个句子中用到doubt的宾语从句，proposing做伴随状语，同时带有一个宾语从句； 考点： 提纲类作文