If my city council wants to hear my idea, I will suggest that the money is used to build a sports field for the teenagers who do not have one on their school campus. ← 完全可以用口头陈述的方式来开头一篇托福独立写作。当话题就是很everyday topic的时候，不要刻意“拔高”题目的立意，不要让措辞太“严肃”，从而失去“话语感”。 Under the circumstance that some local high schools do not have a sports field for their teenage students, the public garden for all residents, albeit a good idea, is less important.

The field is needed because the field will be a proper place for exercise and sports activities and also because teens need the place where theirredundant energy can be consumed, which would otherwise be used to do silly things.  ← 并列的原因状语从句作为段落中心句的核心。 First of all, without the shared sports field, teens who do not have a playground on the school campus will never have good P.E. classes, without which their physical development may be in trouble. This is the simplest reason yet the most important one.  ← “反证法”：如果没有什么就出现什么“恶果”。 Second, if there is no such a place, where they can spend their time and energy doing meaningful activities, some teens may hang out in the streets and idle their time away doing stupid things.  ← 依然是“反证法”：如果没有什么就出现什么“恶果”。  This sounds alarming yet does happen. Many cases of juvenile delinquency would not happen if the energetic juveniles could have a place to let go of their energy through playing basketball or soccer. 

让步后置 →  Admittedly, the garden seems to be a fair option as it would be provided for all of the residents rather than for a small group of them. Some people may never take a walk in the garden, and they may still want to have a share of it. Others may come up with a number of ideas about the benefits of having the garden, such as a landscape that elevates the environment of the town, a public space where people meet and know their fellow residents during the morning jog or their wandering on weekends. 让步后一定要质疑和反驳→ However, will the garden be made full use of? How many of the town’s residents have the habit of morning jog or jog in the garden? How many of them would stroll in the garden rather than visit the town’s mall or wouldn’t they prefer to have a chat in a café over a cup of coffee?  ← 并列的多个反问句来质疑/挑战让步的内容。 And to elevate the town’s atmosphere, the council may have a number of alternative ways that would not require such a large and complete space. For example, planting trees or growing flowers on the sidewalks of streets can also well afforest the town. 

At this point,  we should be convinced that ← 引导总结的内容时，不是仅有in conclusion/to sum up之类的短语 compared with the lack of a proper playground for the town’s adolescent youths, the elevation of the environment or having a public space is not so significant. Not to mention that the likely rare use of the garden or lesser need for the it.