1、开头句型
（1）recently the problem of ... has aroused people s concern.最近，......问题已引起人们的关注。
（2） recently the problem of ... has been brought to public attention.最近，......问题已引起公众的广泛关注。
（3） recently, the problem of ... has been brought into focus.最近，......问题已成为关注的焦点。
（4） man is now facing a big problem—(pollution), which is becoming more and more serious.人们现在正面临一个很大的问题—污染，而且正日益严重。
（5）have you ever thought of...?你是否曾经想过.....?
2、结尾句型
（1）All in all, we cannot live without……,but at the same time we must try to find out new ways to cope with the problems that would arise.(总之，我们没有……无法生活，但同时我们必须寻求新的解决办法来面对可能出现的新问题)。
（2）In short, it can be said that……(总之，他的意思是……)
（3）aking all these factors into consideration, we naturally/reasonably come to the conclusion that……(把所有的这些因素加以考虑，我们自然可以得出结论……)
（4）Hence/Therefore, wed better come to the conclusion that……(因此，我们最好的出这样的结论……)
（5）From what has been mentioned above, we can come to the conclusion that……(从上面提到的，我们可以得出结论……)
