As we all know, pollution is harmful to living beings. There are many different types of pollutions in this world. For instance, water pollution, air pollution, noise pollution and so on. Water pollution cause many kinds of disease that have negative effects on human beings, sometimes the diseases will take people’s life away. Dirty air will increase the rate of getting lung cancer. While the noise pollution will cause insomnia. People’s health condition will be damaged.

In my humble opinion, people should take measures to control the pollution. Recently, not only the government, but also individual has taken part in the action of protecting the environment. This is a good sign. Rivers are being cleaned, air is purified, and the people come to realize that the importance of protecting the environment. However, this is not enough, the problems are still exist. Not all of them have been solved. Some factories are still pouring dirty water into the rivers or give off the toxic gas into the sky. We should know that protecting the environment needs everybody’s effort. 我们都知道，污染对生物有很大危害。在这个世界上，有许多不同类型的污染。例如：水污染，空气污染，噪音污染等等。水污染会使人们生病，甚至死亡。脏空气会使患肺癌的几率上升。而噪音污染会让人失眠。人们的健康水平会下降。在我看来，人们应该采取措施去保护环境。最近，不仅仅是政府部门，个人也参与到环保中去。这是个好现象。河流干净了，空气清新了，人们也意识到环保的重要性。然而，这些还远远不够。问题依旧存在。不是所有的问题都得到了解决。一些工厂依旧往河流里面排放污水，向天空排放有毒气体。我们应该谨记环境保护需要每个人的努力。

In my life, I have encounter many teachers. They all have different personality. Among all the teachers, I have a very specially teacher. You may be very surprised at my answer--the dictionary. The dictionary is a living teacher. When I was young, I really love to turn to the dictionary for help. Whenever I come across a new word, I will consult it and know its definition. I guess every student, their first teacher is dictionary. The dictionary is a good teacher. It is convenient, inexpensive and contained almost everything. Sometimes I am just too shy to ask my teachers about the questions I have on my mind. Then I will turn to my dictionary for help. She is quite and never reject my request. The more I use it, the more familiar I will become with it. Right now, I really good at finding the page I am looking for. As far as I concern, a dictionary is a necessity especially when you need to learn a foreign language. But you should remember that you can not never become too dependent on it. Basic language skills don’t come from dictionaries, but from practices. Anyway, it’s still my favorite teacher. 在我生命中，我遇到过很多老师。他们有着不同的性格特点。在所有的老师当中，我有一位非常特别的老师。你可能会对我的答案感到惊讶，那就是字典。字典是位好老师。当我还小的时候，我很喜欢翻阅字典。当我遇到一个新词，我就会查字典并弄明白它的含义。我想每一位学生的第一位老师都是字典。字典是个好老师。它不仅方便、便宜，还包含了所有的东西。有时候我过于害羞，不敢向自己的老师提问，我就会求助于字典。它不仅安静，也从来不会拒绝我的请求。我用得越多，就越熟悉它。现在，我非常擅长查找自己所需的页码。就我看来，如果你要学习外语，那么字典就是必需品。但是你不能过分的依赖于它。基本的语言技巧不会来自于字典，而来自于实践。但无论如何，字典是位好老师。

Recently, an investigation has caused heated debate among the society. The result of the investigation has showed that about 50% of students in cities have private tutors. Some people think it’s quite necessary to hire a tutor to help the students with their homework, while some people argue that hiring a tutor has more disadvantages than advantages.

最近，一项调查结果在社会上引起了强烈讨论。调查的结果显示：在城市中有大约一半的学生请家教。一些人认为请家教辅导学生写作业很正常，而另外一些人则认为请家教弊大于利。

Why private tutoring is so popular? Well, many parents, for different kinds of reason, did not have the chance to receive a good education. When their children have problems in their study, they become helpless. Turn to the tutors for help seems to be the only solution.

为何家教如此流行？很多家长，因为某些原因，没有得到很好的教育。当他们的孩子在学习中遭遇困难时，他们变得手足无措。而请家教就成了的解决方式。

On the surface, hiring a tutor can help students to improve their marks, but in fact, it takes up too much time of the students’ time that they will have no time for rest and entertainment. They spend all their time on study, they don’t have time to do exercise or play outside. What’s more, some teachers are eager to help students to do well on the exams, offering unnecessary tasks for the students, in this case, the students burden will be very heavy to some degree. Thus, I think it’s not necessary to have private tutors. 表面上看，请家教能帮助学生提高成绩。但实际上，它占用了学生过多的休息于娱乐时间。学生们把所有的时间都花在学习上，都没有剩余的时间去锻炼或者出去玩。更糟糕的是，有些老师忙于帮学生提高成绩，无意中给学生增加了很多压力。因此，我认为请家教弊大于利。