【正确答案】 C

【答案解析】[听力原文] W: What does the term 'alternative energy source' mean? M: When we think of energy or fuel for our homes and cars, we think of petroleum—a fossil fuel processed from oil removed from the ground, of which there is a limited supply. But alternative fuels can be many things. Wind, sun and water can all be used to create fuel. W: Is the threat of running out of petroleum real? M: It has taken thousands of years to create the natural stores of petroleum we have now. We are using what is available at a much faster rate than it has been produced over time. The real controversy surrounding the amounts of petroleum we have is how much we need to keep in reserve for future use. Most experts agree that by around 2025, the amount of petroleum we use will reach a peak. Then production and availability will begin to seriously decline. This is not to say there will be no petroleum at this point. But it'll become very difficult and therefore expensive to extract. W: Is that the most important reason to develop alternative fuel and energy sources? M: There're two very clear reasons to do so. One is that whether we have 60 or 600 years of fossil fuels left, we have to find other fuel sources eventually. So the sooner we start, the better off we will be. The other big argument is that when you burn fossil fuels, you release substances trapped in the ground for a long time, which leads to some long-term negative effects, like global warming and greenhouse effect. Q: What do we usually refer to when we talk about energy according to the man? 听前预测： 1．四项均为名词短语。 2．四项均含有与能量或燃料相关的内容(coal, power, fuel, electricity)。 结论：推测该题以what开头进行提问，可能涉及与能量或燃料相关的信息。听音时，应重点关注四个选项中的关键词，并留意与能量或燃料相关的内容，最后根据问题作出进一步的判断。 在对话一开始，女士问男士“可替代能源”这个术语是什么意思，男士说当我们想到家用或者车用的能源或燃料时，我们都会想到石油——一种用从地底下开采出来的油处理而成的矿物燃料。由此可知，男士的意思是我们谈论的能源通常指的是由从地下开采的石油生成的燃料，故选项C正确。其他三项对话中均未提及，都可排除。

【正确答案】 D

【答案解析】[听力原文] Q: What do most experts agree on according to the man? 听前预测： 1．四项均提到了与石油有关的内容(oil, oil reserves, oil consumption, oil production)。 2．三项均提到了某种问题(will be exhausted in a decade, has given rise to many global problems, begin to decline worldwide)。 3．三项使用了一般将来时(will)。 结论：该题考查的内容可能与将来石油可能出现的问题有关。听音时，应将重点放在各选项的关键词上，然后根据问题作出进一步的判断。 在对话中，男士说目前的石油自然储备经历了数千年的时间才形成，人们使用现有石油资源的速度远远超过它在历史中的形成速度。大多数专家认为到2025年左右，人类所使用的石油量将达到顶峰，在那之后石油的产量和可用量将开始大大减少。故D项正确。A、B两项对话中未提及，C项对话中虽有提到，但不是大多数专家们同意的内容，故三项都可排除。

【正确答案】 B

【答案解析】[听力原文] Q: What does the man think we should do now? 听前预测： 1．四项均以动词原形开头。 2．两项提到了与燃料有关的内容(fossil fuels, alternative fuels)，两项提到了与全球环境问题有关的内容(global warming, the greenhouse effect)。 结论：该题以what开头对动词进行提问，考查的内容可能与为了保护环境应该在燃料使用方面采取什么措施有关。听音时，应将重点放在各选项的关键词上(minimize the use of fossil fuels, developing alternative fuels, find...cause for global warming, reduce the greenhouse effect)，然后根据问题作出进一步的判断。 在对话的最后部分，女士问是否因为到2025年左右石油的使用量达到顶峰，在那之后石油的产量和可用量将开始大大减少，所以才要开发可替代燃料和能源。男士说开发可替代燃料和能源有两个显而易见的原因，接着对这两个原因进行了详细说明。由此可知，在男士看来，我们目前应该做的事情就是开发可替代燃料和能源，故B项正确。“可替代能源(alternative energy source)”这个术语对话中频繁出现，可以推断为本段对话的中心词，如果没有听到该题的确切答案，也可以由此推测本题选B。A项对话中未提及，C、D两项涉及的全球环境问题对话中确实有提及，但那是男士在陈述之所以要开发可替代燃料的第二个原因时提到的，是燃烧矿物燃料造成的影响，而不是男士认为我们目前应该做的事，故这三项都可排除。

【正确答案】 A

【答案解析】[听力原文] Q: How do fossil fuels affect the environment? 听前预测： 1．四项均以they开头。 2．四项内容均带有负面色彩。 结论：本题考查的内容很可能与某些事物的负面作用或影响有关。听录音时要听清they的指代对象，并将听音重点放在四个选项的关键词上(release harmful substances，cause a waste of water, release poisonous gas, burned inefficiently resulting in a waste of resources)。 在对话中男士提到，当你燃烧矿物燃料时，会释放很多物质，这些物质已经在地下存在了很长一段时间，而这会导致一些长期的负面影响。由此可知，在燃烧矿物燃料时会释放出有害物质，故选项A正确。释放有害物质并不等同于释放有毒气体，所以C项可排除。B、D两项对话内容并未提及，应排除。