在写作中，中间段落安排有两种情况：
1.平行结构
2.总分结构
比如我们要讨论：C9P53P165-高中生是否要去参与免费的义务劳动。-这是我们学习的第一篇范文
本文的作者立场是一边倒--Completely agree, 在文章中提出了3个优点。这三个优点是分为三段写作的，相互之间独立，这就是平行结构。如果作者把3个优点写成一个大段，并在这一段的开头写一个总分结构的句子：There are three advantages of doing free community services.这就是总分结构 (很明显，作者不会这么写，因为这样子这个段落会太长)。
比如我有两个观点是关于网络学习的优点。第一: 时间灵活。第二: 课程选择范围广。
两个观点各写一段，相互之间独立，这就是平行结构。如果把两个观点写成一个大的段落(这时候段落最前面要加一个总结句：网络学习有两个优点)，这就是总分结构。
那么我们到底采用哪种结构呢？请听语音解析。
接下来给大家看一个总分结构的文章，第四天任务中全文写作会在明天给一个平行结构的参考范文。
Some people think that the best way to improve road safety is to increase the minimum legal age for driving a car or motor-bike. To what extent do you agree or disagree?
It has been claimed that a simple rise in the minimal legal age for drivers would be the best safety measure to make our roads safer. I disagree with this claim because I believe other measures would be equally effective in tackling this road safety issue. （开头段表态）
There are two major reasons why moving the age limit up could help. The first one is that young drivers often overestimate their driving skills and underestimate the potential dangers on the road. Therefore, they are generally less disciplined and alert than older drivers while driving. In addition to this, young drivers, especially teen drivers, may not be fully aware of the importance of obeying traffic laws, so they are more likely to have many dangerous driving habits, such as driving over the speed limit, driving tiredly, or eating, drinking, or talking on the phone while driving, which can cause accidents on the road.（总分结构段落，写作两个观点）
Nevertheless, safe driving can be promoted in several different ways. Firstly, strict punishments can certainly help to encourage people to drive more safely. Penalties for dangerous drivers can act as a deterrent, meaning that people avoid repeating the same offence. There are various types of driving penalty, such as small fines, license suspension, driver awareness courses, and even prison sentences. Secondly, it is vitally important to educate people properly before they start to drive, and this could be done in schools or even as part of an extended or more difficult driving test. （总分结构段落，写作两个观点）
In conclusion, raising the age limit for driving is a good proposal, but it is only one of the many effective measures.
