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  3. Write a composition of about 150 words on the following topic: It is now generally accepted that vehicles (cars, trucks, etc. )

Write a composition of about 150 words on the following topic: It is now generally accepted that vehicles (cars, trucks, etc. )

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问题 Write a composition of about 150 words on the following topic:
It is now generally accepted that vehicles (cars, trucks, etc. ) are a major source of air pollution in cities. You are to suggest only ONE way to solve the problem.
                             ONE WAY TO SOLVE THE PROBLEM
You are to write in three paragraphs.
In the first paragraph, state what your suggested way is.
In the second paragraph, state one or two advantages of your suggestion.
In the last paragraph, bring what you have written to a natural conclusion.
Marks will be awarded for content, organization, grammar and appropriacy. Failure to follow the instructions may result in a loss of marks.
选项
答案 One Way to Solve the Problem 　　It is now generally accepted that vehicles (cars, trucks, etc. ) are a major source of air pollution in cities. Some solutions to the problem have been proposed, such as reducing the number of vehicles and using lead-free petrol. However, I would suggest replacing petrol with electricity as the source of power. The substitution of petrol with electricity is advantageous for at least two reasons. On the one hand, electricity is clean. As we know, the use of petrol has proved to be the most serious cause of pollution when we drive in vehicles. If electricity is applied, no pollutants will be yielded or produced. On the other hand, unlike petrol, electricity is almost inexhaustible. Now that many ways of generating electricity are available today, the resort to electricity may free us from the worry that the power needed for vehicle use may run out someday. As a consequence, we will not have to impose restrictions on the use of vehicles. Nor will we need to trim down their number. To sum up, using electricity as power is arguably an ideal solution to the problem of vehicle pollution. It can both keep the air clean and permanently satisfy the needs of vehicle users.
解析 1．写三段，字数150字左右。  时间35分钟。
2．第一段：明确交待你针对由于用车而带来的空气污染所提出的解决方案。第二段：阐述至少一个该方案所具有的好处来支持你所取的观点。第三段：简要总结前面的讨论。
3．文体为议论文，就解决特定问题讨论自己的看法。
4．只能讨论一种解决方案，而且必须围绕汽车导致空气污染这一问题来讨论解决方案。
[写作提纲]
第1段：先引出话题(如指出人们公认在城市里汽车是空气污染的主要来源)，再提出自己的解决方案。
第2段：给出主题句(如用电代替汽油有多重好处)，然后侧重讨论两大好处(如电作为动力来源是清洁的；电作为动力来源几乎是永不枯竭的，因此我们无须限制用车)。
第3段：(用不同的语言表达方式)重申自己的观点，总结上面的讨论。
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