【what city brings to us】

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Nowadays,the maps of cities are updated frequently.With the development of city,more and more suburbs bee parts of the city.When the cities in the world are amplifying constantly,people discuss the topic hotly,the causes and consequence of the enormous cities.Different people have different answers by their respective views.
In my opinion,the evolution of society and the development of economy result in the growth of the vast size of cities.Since the number of population in every city is increasing continually,people need a large amount of space to live in.With the progress of the technology,the output of crops rises sharply.Fewer and fewer farmers are required,as a result,more and more villages urbanize.The growth of the cities brings us many huge changes.
There are more job opportunities in the cities.For instance,China will hold the Olympic Games in Beijing in 2008.The government is amplifying the size of Beijing to build new gyms in order to hold it excellently.Obviously,people in the cities could gain a lot of new jobs.
Of course,the enormous size of cities also has bad effects.Pollution is being more and more serious all over the world with the amplification of the cities.For example,the poisonous gas sent off by factories and automobiles has made the air unhealthy for people to breathe.Water waste keeps pouring into rivers and lakes; as a result,many water species are dying out.Furthermore,more people the city have,more rubbish we can find.
In a word,since each coin has two sides,we should be acquainted clearly with the reasons why the size of the cities has grown enormously and what it will bring us.Thus,we could make full use of the positive effects and overe the negative effects.（上海新东方名师 张驰新）
======以下答案可供参考======
供参考答案1:
1.在有了好的心态后，演讲稿就成为了第二要点。首先你要明白，演讲稿不是普通的英文文章，它是一篇热情洋溢，激情四射的阐述你的观点的文章，它必须能够吸引听众的注意！一篇好的演讲稿应该能够很清楚的一开始就让听众知道你在说什么，做到这一点并不容易，因为有时太过于直接会让大家感到突如其来，应该有一定的缓冲。我看了很多外国名人的演讲后总结出以下几种形式：
①. 问候天气，然后 转入正题。
②. 寒暄。如：Good morning!I’m very glad stand here and give you a talk.
③. 开门见山。如：Good morning!Today I stand here to talk about…
有了好的开头，在演讲稿中，为了调动大家的激情，可以多运用排比句，在这点上美国的著名演讲家：Martin Luther King,Jr.可以称的上是专家。
2.演讲稿写好后，你应该背过它，这是最起码的要求！因为如果拿着稿子去演讲的话，听众大都会认为你准备不充分，一开始就无法被你的内容所吸引。同时，这也会给别人一个信号：你的信心不充足。所以，背过它，背的滚瓜烂熟！这才能保证别人会被你吸引住。
3.背过了演讲稿，是处理它的时候了，什么地方该停顿，什么地方语气该加重，什