1.引出话题句子
Recently, the problem of …... has aroused people’s concern. 最近,……问题已引起人们的关注.
The 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中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。
Nowadays, (overpopulation) has become a problem we have to face. 如今,(人口过剩)已成为我们不得不面对的问题了。
It is commonly believed that ….. / It is a common belief that ….. 人们一般认为…… Many people insist that ..…