相关知识点：Thesis statement 在整个文章中有着重要的作用,它是整个文章的灵魂,所以写好它,就等于文章写了一半出来,在写thesis statement 必须要做到以下几点：
1.一个好的论文必须有一个Point 和 purpose
5.thesis statement 必须是一个完整的句子,去陈述这篇论文的结论和为什么会有这个conclusion.
下面是一些thesis statement 的例子,可以慢慢体会,从中学习.
As global trade increases, many goods including those we use on a daily basis are produced in other countries and transported long distances.
Do the benefits of this trend *outweigh the drawbacks?
下面是thesis introduction，我们将thesis statement加粗：
Due to the increase in global trade, many of the goods that we consume every day are made in a different country and then transported over a long distance in order to reach us. In my opinion, this trend has more disadvantages than advantages.
Some people think that young children should be allowed to do paid work, while others think that this should be illegal.
Discuss both opinions and give your opinion.
Some people belive that it is acceptable for young children to undertake jobs that they are paid for, whereas others believe that this is wrong and should be illegal.This essay will discuss both sides of the issue.
At present, more and more young children are becoming involved in paid work. Whilst some people are of the opinion that this is an entirely acceptable practice, others believe that this is completely wrong and should be made illegal.
At present, more and more young children are becoming involved in paid work. Whilst some people are of the opinion that this is an entirely acceptable practice, I believe that this is completely wrong and should be made illegal.
Currently there is a trend towards the use of alternative forms of medicine. However, at best these methods are ineffective, and at worst they may be dangerous.
To what extent do you agree or disagree with this statement?
Alternative medicine is not new. It is accepted that it pre-dates conventional medicine and it is still used by many people all over the world. However, I strongly believe that this form of medicine does not work and is possibly a danger to those using it.
Alternative medicine is not new. It is accepted that it pre-dates conventional medicine and it is still used by many people all over the world. I am unconvinced that it is dangerous, and feel that both alternative and conventional medicine can be useful.
Alternative medicine is not new. It is accepted that it pre-dates conventional medicine and it is still used by many people all over the world. I agree that for certain conditions this type of medicine is ineffective and could even be dangerous, but for some illnesses it is a good alternative choice.
Overpopulation of urban areas has led to numerous problems.
Identify one or two serious ones and suggest ways that governments and individuals can tackle these problems.
Many countries of the world are currently experiencing problems caused by rapidly growing populations in urban areas. Both governments and individuals have a duty to find ways to overcome these problems.
The percentage of overweight children in western society has increased by almost 20% in the last ten years.
Discuss the causes and effects of this disturbing trend.
Over the last ten years, Western societies have seen close to a 20% rise in the number of children who are overweight. This essay will discuss some reasons why this has occurred and examine the consequences of this worrying trend.
In order to solve traffic problems, governments should tax private car owners heavily and use the money to improve public transportation.
What are the advantages and disadvantages of such a solution?
Traffic congestion in many cities around the world is severe. One possible solution to this problem is to impose heavy taxes on car drivers and use this money to make public transport better. This essay will discuss the benefits and drawbacks of such a measure.