4. What kinds of human activities can cause damage to the earth? How can we reduce the damage caused to the earth?

人類破壞環(huán)境的行為可謂五花八門，亂砍濫伐、涸澤而漁等等，現(xiàn)代社會又發(fā)展到隱形階段，譬如臭氧層正在遭受的無形破壞。如何減少這些人為因素對自然界的影響甚至是危害，是目前全人類共同的話題。希望考生能夠通過解答這些問題提出一些可行的建議。

Candidate 1: In my opinion, greed is the root of all evil. People with greedy desire, in order to make more profits, endlessly exploit resources. They are shortsighted and eager for instant benefit. Some merchants cut trees to acquire wood, pour waste water into river, and catch animals for their fur to make money without realizing that the limited natural resources could be used up someday if they don't recycle. Then, there would be no more forests, clear water or air and living organisms. Therefore, form now on, we must adopt the strategy of sustainable development and learn to live in harmony with nature.

Candidate 2: Many human activities have caused damage to the earth, such as cutting down great numbers of trees, pouring waste water into rivers, dumping rubbish in the sea. There are simply so many actions that I can't enumerate one by one. In order to reduce the damage to the earth, we should do something in a peachful way. For example, we can still cut down trees, but every time when we cut down one, we should promise to plant two. Waste water must be treated by special processes before it is poured into the river. When it comes to the rubbish, we will think about recycling, which has been discoursed on for nearly ten years. It can protect environment, save power for us, and what's more, it can make the rubbish become useful!

Candidate 3: We live on the earth, and we are children of our Mother Nature. Our Mother selflessly offers so many things to us to live a better life. But we just want more and more from her, sometimes we even adopt extreme methods to harm our Mother. For instance, we cut down trees and exploit resources time and time again without recycling. At the same time, we leave useless things to the earth, which usually will pollute the environment severely. We are those selfish ones and think little of our Mother.

But when our Mother falls ill, can we live a good life? The answer is obvious—No! So, don't just sit back and leave the problems to the experts or the governments any more. As citizens of the Earth, we all have the responsibility and ability to preserve and sustain the environment we have. Only when we realize the importance of protecting our Earth, will the problems be solved in a more sensible manner.

三個答案的組織簡潔有力，語言流暢。Candidate 1回答剖析了貪婪是一切罪惡的根源，同時升華到可持續(xù)發(fā)展戰(zhàn)略的重要意義；Candidate 2提出了我們應(yīng)采取的相應(yīng)措施；Candidate 3則從感情入手，論證了人類和地球母親的關(guān)系，以情育人，極易獲得考官的認同。

注：敬請轉(zhuǎn)載注明出處！