开头 
Recently, the problem of … has aroused people’s concern.
最近,…问题已引起人们的关注.
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…
很多人坚持认为…
With the development of science and technology, more and more people believe that … 随着科技的发展,越来越多的人认为…
A lot of people seem to think that…
很多人似乎认为…

结尾 
Taking all these factors into consideration, we naturally come to the conclusion that…
把所有这些因素加以考虑,我们自然会得出结论…
Taking into account all these factors, we may reasonably come to the conclusion that … 考虑所有这些因素, 我们可能会得出合理的结论…
Hence/Therefore, we’d better come to the conclusion that…
因此,我们最好得出这样的结论…
There is no doubt that (job-hopping) has its drawbacks as well as merits.
毫无疑问,跳槽有优点也有缺点.
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…是无法生活的.但同时,我们必须寻求新的解决办法来对付可能出现的新问题. 作者：答案资料 https://www.bilibili.com/read/cv16604628/ 出处：bilibili