求一篇大学英语作文，字数500左右，急急急！！！

【1】The weather change in Beijing
we all know that the weather in Beijing is very hard several years ago.It rained rarely, a few times a year,and the rain isn't heavy,either.We all felt uncomfortble for the dry weather these years.It not only brought fierce wind but also with lots of sands in it.making the sky of Beijing a grey colour.and dim especially in spring and fall.
But later we saw a very gratifying situation in the north of Beijing.Government and many public good people invested money,with the help of many cities,a large quantity of trees had been planted there.This made it possible to prevent the sand storm from blowing into the city directly.Not only this.The related department had also release some rules to limit and control the release of the offgas from factories.the human life pollutions and the construction wastes pollution were both taken measures to control.
All of this have made positive weather change in Beijng.Several years later,the rain is getting more and more,also heavier,Bring the city a fertile earth and cool air.Then the river is running and getting cleaner.The terrible weather happens lesser.We all feel a lot more comfortable at this.and we belive that the environment in Beijng will be better with our efforts!

【2】Beijing， the capital of China,is a very beautiful and important city,which is one of the ancient cities in China. There are many famous wonders and beautiful spots,such as the Great Wall,the Forbidden City,the Summer Palace,Beihai Park and so on.

Beijing is also the centre of politics,economy and culture of our country. Owing to the open-door policy,great changes have taken place since 1978. Many new houses and tall buildings can be seen everywhere. Peole's living condition is getting better and better. Beijing has been successfully in her bidding for the 2008 Olympic Games. I'm sure greater changes will take place in Beijing in the next few years. I love Beijing.