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1、引出開篇類：Recently the problem of…… has been brought into focus. ==Nowadays there is a growing concern over ……(最近……問題引起了關(guān)注)。

2、提出建議類：There is no doubt that enough concern must be paid to the problem of……(毫無疑問，對(duì)……問題應(yīng)予以足夠重視)。

3、故事引出類：I have a friend who ... Should he....? Such a dilemma we are often confronted with in our daily life.

4、表達(dá)不同觀點(diǎn)類：Peoples views on……vary from person to person. Some hold that……However, others believe that……(人們對(duì)……的觀點(diǎn)因人而異，有些人認(rèn)為……然而其他人卻認(rèn)為……)

5、預(yù)示后果類：Obviously，if we dont control the problem, the chances are that……will lead us in danger.(很明顯，如果我們不能控制這一問題，很有可能我們會(huì)陷入危險(xiǎn))。