第三段：表达反面观点
主题句：every thing has two aspects.
扩展句：1、___ can also bring us some challenges. for example, ______.
2、in addition, it will be more difficult for _____ to _____, as ____.
第四段：结尾，表明自己看法
结尾句：however, ____ does more good than harm to ____.
扩展句：what we should do is to ______.
[diy写作模板：填充阶段]
第一段：文章的开头
开篇句句：china finally succeeded in jointing the wto after many's efforts.
扩展句：this event will influence the economy in china greatly
第二段：表达正面观点
主题句：jointing the wto brings china many benefits and opportunities.
扩展句：1、as a member coutry, china can enjoy many rights that can boost the development of the economy in china.