托福写作回忆和解析含范文   本文由培顿 教育成都学校李丹老师整理提供，供大家参考学习！本次托福考试写作综合点评：这次托福考试写作部分整体难度适中。其中，综合写作考查环境类，整体难度适中，除了部分环境类的专业词汇。独立写作考查教育类话题，难度适中，类似2019/6/29考题，学生在备考过程中如果熟悉有关教育类素材应该问题不大。

　　本文带来综合写作分析：

　　综合写作

　　话题分类环境类

　　考题回忆总论点三种alternative methods去代替fossil fuel，来解决global warming

　　阅读部分现在汽车使用化石燃料会释放二氧化碳carbon dioxide，是造成全球变暖global warming的主要原因，提出了三种alternative methods去代替fossil fuel：

　　分论点一： 氢能源hydrogen energy。氢能源是有氢hydrogen和氧oxygen产生的，不会排放二氧化碳carbon dioxide，只会排放水；

　　分论点二：生物燃料bio-fuel。生物燃料是从植物中提取的（extracted from），提取过程中是释放release二氧化碳，但是，植物生长过程中是会吸收absorb二氧化碳的，所以吸收的二氧化碳是可以抵消释放出的二氧化碳的 ；

　　分论点三：从空气中提取二氧化碳转化convert成替代合成燃料。这样即便燃料使用过程中排放二氧化碳，也只是一种二氧化碳的循环，不会真正增加空气中二氧化碳含量。

　　听力部分认为这三种alternative methods都not practical或有drawbacks：

　　分论点一：氢燃料确实不会释放二氧化碳，但是生产加工出氢燃料的过程是需要燃烧传统的含碳的fossil fuel的，比如需要使用天然气，而用天然气去生产氢燃料仍然会释放大量的二氧化碳，所以global warming并不会得到缓解；

　　分论点二：生物燃料无法去replace化石燃料。因为要生产bio-fuel，那就需要种植大量的植物，需要有足够的land。例如，在美国生产bio-fuel的话，需要用掉两百万平方公里的土地来生产玉米和甘蔗corn and sugar cane，这个面积相当于美国现在农业用地的两倍。然而实际上，并没有那么多土地去种植；

　　分论点三：从空气中提取燃料，在目前来看并不实际not practical。现在的科学技术还无法实现将大量二氧化碳转化成大量燃料来满足现在人们对燃料的需求。

　　解题思路传统四段式写作，每一段阅读内容+听力内容，注意细节和同义替换

　　参考范文The reading passage claim that nowadays since the increasing use of automobiles, the discharge of carbon dioxide is the main reason for global warming. In order to reduce the use of fossil fuels, the writer offers three solutions to replace its use. The listening material, however, points out that these methods are not practical.

　　First of all, the reading passage suggests to use hydrogen energy, which is composed of hydrogen and oxygen so it cannot release carbon dioxide except for water. However, the listening argues that the production of hydrogen energy needs to burn fossil fuels, such as natural gas. The whole process will still produce carbon dioxide and so cannot help alleviate global warming.

　　Secondly, the article says that bio-fuel is another effective way, which is extracted from plants. Although this process may release carbon dioxide, the growth of plants can absorb these CO2. The lecturer, however, rebuts it by pointing out that in order to produce bio-fuel, a large number of plants need to be cultivated, but the truth is that there are not enough lands. He takes America as an example. To produce bio-fuel, two million square kilometres of lands need to be used to plant corn and sugar cane, which almost double the agricultural lands in the US.

　　Finally, the author advises to convert CO2 in the air into another synthetic fuel, by which he means that although it still could release CO2, this process is only a recycle of CO2 and no more CO2 can be produced. In contrast, the lecturer’ position is that because the technologies at present cannot convert such a large amount of CO2 into fuels to meet people’s demand, this method is not practical at all.

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