写作思路：确立中心，围绕选材，确定重点，安排详略，选材时要注意紧紧围绕文章的中心思想。
I want to be a volunteer, because I think it's very happy to help others.
我想成为一名志愿者，因为我认为帮助别人是非常快乐的。
I ll volunteer for children. I ll going to teach children who have trouble in reading.
我将为孩子们做志愿者，我要教那些阅读有困难的孩子。
And I want to be a teacher and I love children and reading, so it is important for me. And I believe everyone can happy.
我想成为一名教师，我喜欢孩子和阅读，所以这对我来说很重要。我相信每个人都能快乐。
I will work hard for my dream. And being a volunteer is great.
我将为我的梦想而努力。做一名志愿者是很好的。
写作思路：确立中心，围绕选材，确定重点，安排详略，选材时要注意紧紧围绕文章的中心思想，选择真实可信、新鲜有趣的材料，以使文章中心思想鲜明、深刻地表现出来。
Every day, we can see the figures of the volunteers. Actually, they have formed a kind of scenery of the city. Some people hold that volunteering is merely a waste of time, because the volunteers have no gains with pains. However, I believe that doing voluntary is quite rewarding.
每天，我们都能看到许多的志愿者，事实上，他们已经成为城市的一道风景线了。有些人认为做志愿者就是单纯地浪费时间，因为做志愿者是只有付出没有回报的。然而，我相信做志愿者还是有一定回报的。
In the first place, we can put into practice what we have learnt before, for instance, when we were asked by a foreigner about the way to some place, we could practice our oral foreign language, it’s definitely a good opportunity to express ourselves in a foreign language correctly and clearly.
首先，我们可以把以前学过的东西付诸实践。例如，如果外国人向我们问路，我们就能练习口语，这肯定是一个用外语清楚地自我表达的好机会。
In the second place, we could make a lot of new friends while we are volunteering As a proverb says, “At home one relies on one’s parents and outside on one’s friends”, so it is never a bad thing to have lots of friends.
第二，做志愿者的时候可以交到很多新朋友。正如谚语所说的，在家靠父母,在外靠朋友。所以，拥有很多朋友永远都不会是件坏事.
Finally, helping others is a good way to make you feel happy and when you help others solve a problem successful, you will feel fulfillment. In this sense, we reap a bountiful spiritual harvest by doing voluntary work.
最后，帮助别人是获得快乐的好方法，当你帮别人成功的解决问题的时候，你会有成就感。从这种角度来看,做志愿者可以丰富我们的精神。.
On the whole, we can benefit a lot by engaging ourselves in the voluntary work. Therefore, I suggest those that have abundant spare time registering as volunteers for the welfare for the public.
总之，从事志愿工作可以让我们从中获得很多好处。因此，我建议那些业余时间充足的人可以去做志愿者，为社会谋利。
I am writing to you to apply for the volunteer work. I have read the requirements you have listed, and I am confident that I have the qulification of serving as an volunteer. I have sophistcated use of English language, and the utterest interest in sports. I am good at communication, and willing to contribute myself to helping the others. I promise to do the best of me and provide the most pleasing service. If I am considered qualified of being the volunteer, please call me at 8888888. I look forward to your reply. Thank you for your consideration.
Best regards,
XXX
这个基本上是按外国申请工作时最标准的商务信件格式写的。如果觉得太过了，从I look foward 后面都可以删掉。不过I am是正式写法，最好不要图省事缩写。希望有帮助^ ^
