开篇句：Recently the issue has aroused great concern among…

　　主体句：to begin with， then， furthermore， finally

　　结尾句：Taking all these into account， we…

　　To solve the above-mentioned problem， we must…

　　参考范文

　　简意：“地球一小时”发起于澳大利亚，并得到全球许多城市的响应。该活动旨在倡议人们在特定时间熄灯一小时，来表明他们对全球气候变暖的关注。各地宾馆、餐馆，办公室都举行此类活动，到今天为止，更多地引起了大家的关注与行动，带来了明显变化。

　　Earth Hour started in Australia with millions of homes and businesses turning off their lights for one hour. Man is facing a big problem about global warming which arouses people’s great awareness and concerns.Now， people are all joining together with a worldwide effort to show that it’s possible to take action on the issue.

　　Dozens of hotel，office，buildings，shopping malls and restaurants switched their lights off.People joined in activities such as candle-lit dinners and star-gazing parties as a response to the call for "going dark”.There is no denying that all above-mentioned have brought about good changes among people. It is reasonable to maintain that we should keep the act in mind all the time instead of instant performance.

　　There is no easy method of global warming， but Earth Hour is a message of hope and a message of act. It will have a great influence on people’s attitude towards global warming.We should take responsibility and get involved in working towards a bright future.Everyone can make a difference.