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本题是比较、对照关系题。该句自成一段，首先抓住关键词meaningful upload，这个词组在下一段段首出现，同时出现在选项G中，可以联想其中可能会有关联。然后从文章上下文关系的角度进行验证。空格之前第六段引出了计算机和电视的比较，紧接着第七段从电视的角度进行了介绍，合理推知下一段将可能从计算机的角度进行介绍，同时引出下文的meaningful up-load。浏览各个选项可知，只有G符合要求。

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1 根据下面资料，回答题
The world´ s environment is surprisingly healthy. Discuss. If there were an examination topic,most students would tear it apart, offering a long list of complaints from local smog (烟雾) to global climate change, from the felling (砍伐) of forests to the extinction of species. The list would largely be accurate, the concern legitimate.56) Yet the students who should be given the highest marks would actually be those who agreed with the statement. The surprise is how good
things are, not how bad.
After all, the world´ s population has more than tripled during this century, and world output has risen hugely, so you would expect the earth itself to have been affected. Indeed, if people lived, consumed and produced things in the same way as they did in 1900 (or 1950, or indeed 1980), the world by now would be a pretty disgusting place, smelly, dirty, toxic and dangerous.
But they don´ t.57) The reasons why they don´ t, and why the environment has not been ruined,have to do with prices, technological innovation, social change and government regulation in re-sponse to popular pressure. That is why today´ s environmental problems in the poor countries ought, in principle, to be solvable. Raw materials have not run out, and show no sign of doing so. Logically, one day they must: the planet is a finite place. Yet it is also very big, and man is very ingenious.58) What has happened is that every time a material seems to be running short, the price has risen and, in response, people have looked for new sources of supply, tried to find ways to use less of the material, or looked for a new substitute.
For this reason prices for energy and for minerals have fallen in real terms during the century. The same is true for food.59) Prices fluctuate, in response to harvests, natural disasters and political insta-bility; and when they rise, it takes some time before new sources of supply become available. But they always do, assisted by new farming and crop technology. The long term trend has been downwards.
60)It is where prices and markets do not operate properly that this benign ( 良性的) trend be-gins to stumble, and the genuine problems arise. Markets cannot always keep the environment healthy. If no one owns the resource concerned, no one has an interest in conserving it or fostering it: fis is the best example of this.
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2 第57题答案

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3 第58题答案

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