如题所述
1、It is well-known to us that……（我们都知道……）.....As far as my knowledge is concerned, …（ 就我所知…）
2、Recently the problem of…… has been brought into focus. Nowadays there is a growing concern over ……
（最近……问题引起了关注）
3、Nowadays（overpopulation）has become a problem we have to face.
（现今，人口过剩已成为我们不得不面对的问题）
4、Internet has been playing an increasingly important role in our day-to-day life. It has brought a lot of benefits but has created some serious problems as well.
（互联网已在我们的生活扮演着越来越重要的角色，它给我们带来了许多好处但也产生了一些严重的问题）
5、With the rapid development of science and technology，more and more people believe that……
（随着科技的迅速发展，越来越多的人认为……）
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