文档介绍：【托福写作范文】托福综合写作优秀作文练****题-环保材料乙醇
在托福备考的过程中，综合写作往往对于很多学生来说都会是一大难点，因为其中聚集了听、写、读等各个方面的内容要素，想要让其到达高分并不是件很难的事情。那么，在以下的内容中，我们就为form of tax subsidies given to
ethanol producers by the United Statesgovernment. These tax subsidies have cost
the United States government over $11billion in the past 30 years. If the United
States government were to stophelping the producers in this way, the price of
ethanol would increase greatly.
第三，乙醇燃料燃料在价格上永远无法与汽油竞争。虽然目前对消费者来说，乙醇燃料和汽油的相差无几，但是只是因为美国政府以税收补贴的形式补助乙醇燃料制造商。这个税收补贴在过去的三十年花掉了美国政府110亿美元。如果美国政府停止以这种形式帮助制造商，那么乙醇燃料的价格会大幅升高。
托福综合写作阅读局部需要提取的观点是：
- Main point: 乙醇燃料无法替代汽油
- Sub point 1: 燃烧乙醇燃料会排放二氧化碳，造成全球变暖
- Sub point 2: 制造乙醇燃料导致畜牧业缺乏饲料
- Sub point 3: 乙醇价格过高，依赖政府补贴
托福综合写作听力材料：
Ethanol actually is a good alternative togasoline although you just read
three reasons why it is not a good one of these three reasons is
convincing.
虽然阅读局部说乙醇燃料不是汽油很好的代替品，但是事实上是可以很好代替汽油的。阅读局部给出的三个理由都是没有说服力的。
First, the increased use of ethanol willnot add to global warming. It is true
that when ethanol is burned, it releasescarbon dioxide into the atmosphere. But
as you read, ethanol was often made fromplants such as corn. Well, the process
of growing the plants counteracts thisrelease of carbon dioxide. Let me explain.
Every growing plant absorbs carbondioxide from the air as a part of i