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【填空答案】
1.composed v. 组成；作曲（compose的过去分词）；著作
2.naphtha n. 石脑油；挥发油；粗汽油
3.gasoline n. 汽油
4.combustion n. 燃烧，氧化；骚动
5.antifreeze n. [助剂] 防冻剂
【听力原文】
Since we've been discussing alternative fuels lately, I wanted to pass onto you some information I read about a new fuel that's been in the news a lot lately. It's called A-21.It's composed of water and a chemical known as naphtha. It seems to be avery promising fuel because it's much cleaner than the gasoline that we usetoday. That's not to say that it doesn't pollute, but it is cleaner. A-21 isn'tlike some other alternative fuels that require completely new types of engines.A-21 still works in regular, everyday combustion engines --- like the ones incars --- with only minor mechanical modifications. So changing over wouldn't bea big deal.You may doubt some of these claims as many researchers have. Some peoplefeared that because it contains about 45 percent water it would freeze in thewinter. But a small amount of antifreeze was added to it, and that seems tohave solved the problem.A-21 has recently undergone street tests in buses in Reno, Nevada. So far it seems to work just fine. This is a good thing, especially in Nevada, because the state government there has passed a law requiring that a large percent age of vehicles in Nevada run on alternative fuels. A-21 should help.
