第一段只写两句:
第一句:In recent years, there has been…
第二句:How to solve the problem has become a hot issue among many people.
第二段只写四句:
第一句:What has caused this problem? It seems to me that there are … reasons.
第二句:Firstly, …
第三句:Secondly,…
第四句:Finally,…
第三段只写四句:
第一句:How to solve the problem has become a hot issue among many people.
第二句:For one thing, …
第三句:For another, …
第四句:Only in this way can we successfully solve the problem.