1.Live in a small town or in a big city?
Some people prefer to live in a small town. Others prefer to live in a big city. Which place would you prefer to live in? Use specific reasons and details to support your answer.
People seldom agree with each other even in such trivial issues as preference between a big city and a small town. It's a little bit haste to say that it is better to live in a big city than in a small town, or vice versa.Living in a big city has several benefits. First, there're more job opportunities readily available in big cities than in a small town. Moreover, not merely are there more job positions in big cities and the qualities of the position are much higher as well. In addition, the pay is more decent. Second, children are supposed to be able to receive an education with a higher quality compared with their counterparts who live in a small town. For families,children's education is always put in the first place. Finally, living in a big city usually has a superior living standard to that in a small town. There are more commodities and services in city markets; there are more public
utilities available in big cities; there are even much more television channels in big cities.However, living in a small town also has some advantages. People who live in a small town often have a much comfortable life style. Most of them do not have to suffer high working stress. Although the average pay is much less than that of big cities, the price of daily necessities, such as vegetables or meat, is usually less expensive. Instead of suffering loneliness which is prevalent in big cities, children might grow up more healthily because of harmonious relationship among residents in small town. People in a small town do not have to get up so early in the morning because there has been no traffic jam, and nobody drive so fast in a small town as to cause
car accidents. They might have fewer channels in television, but they have more friends readily available to chat or entertain with. According to my current situation, although I am longing for the cozy atmosphere and relationship among neighbors and friends which almost only exist in small cities, I have chosen to live in one of the biggest cities in my country—Beijing, since I have found a pretty good job here, and a decent pay. I think I would prefer living in a small town when I get retired one day.
Does human activity improve or damage the earth?
Some people believe that the Earth is being harmed (damaged) by human activity. Others feel that human activity makes the Earth a better place to live. What is your opinion? Use specific reasons and examples to support your answer.
饮食起居：广东人把某种海豚(dolphin)吃得almost extinct;美国人养宠物鹦鹉(parrot)，导致南美洲很多稀有品种(rare species)濒临灭绝。
科学研究：好的例子很多，比如电的发明。不好的也很多，克隆(clone)技术、基因重组(gene engineering)技术，可能导致道德(moral value)的沦丧(deteriorated; ruined); 诺贝尔的发明(炸药explosive)究竟杀 了多少人?塑料袋(plastic bags)的发明，导致了多少white pollution?
The environment is usually changed to benefit human life. Cars and roads make transportation fast and easy, factories make products that make our lives more comfortable, public services in cities like water treatment, electricity, and waste disposal make our lives more convenient. All of these advances, however, come with a significant environmental cost. Human activity does significant damage to the Earth.
One of the main effects of human activity on an area is water pollution. Dumping waste materials from human activity into rivers and streams is popular because the waste seems to disappear downstream. The main sources of water pollution are factory waste, oil and gas runoff from highways, and untreated human waste. When this waste dumped into rivers, the water downstream becomes undrinkable and unusable for agriculture, and also kills plant and animal life in the rivers. Clean air and water is a prerequisite not only for human life, but also for all life on the planet. But air is now being polluted by modern transportation, notably gas-powered automobiles, as well as electrical generators that burn fossil fuels and pour polluting chemical waste into the air. This makes the air much less healthy to breathe. The air-borne pollution also falls back to the earth in the form of acid rain, which destroys plant life and human buildings.
Another serious long-term effect of air pollution is global warming. For the past several decades scientists have noted a disturbing rise in the average temperature of the earth that caused by the rise of greenhouse gases, air pollutants created by burning fossil fuels, in the atmosphere. Scientists believe that if humans continue to increase the amount of greenhouse gases in the atmosphere, the temperature of the earth will continue to rise. Eventually, this could melt the polar ice caps and cause devastating costal flooding all over the world. Major cities like Hong Kong, Shanghai, and Dalian might be totally destroyed.
Therefore, I believe human activity has caused serious problems while it has improved the world in which we live. It is time to realize this hazard and take action to prevent further disaster while making progress.