雅思OGtest6听力section3听力原文题目及答案解析【附MP3音频】

　　考生在做雅思听力练习时一定要核对答案解析，方便我们发现自己答题中的问题，有目的的进行练习可以有效的帮助我们掌握题型解题方法。接下来本文为大家分享雅思OGtest6听力section3听力原文题目及答案解析【附MP3音频】内容。

　　Question 21

　　答案：B

　　定位原文：I thought we could start by asking our audience what car engines were first designed to run on - fossil fuels or biofuel.

　　解题思路：I think we need to organise exactly what we're going to say about biofuels during the presentation, and the order，这句话的大意是“我想我们需要组织一下关于生物燃料的这个讲解应该如何说，按什么顺序说”， 提示下文即将具体阐述presentation的讲解顺序，如何开始。定位到I thought we … or biofuel，这句话的大意是通过向观众提问，石油引擎或者生物燃油引擎，哪个是先被汽车使用的。Karina用Nice idea对这个建议表示了同意。对应B选项。B选项中，were in use是对we designed to run on的同义转述;before是对first的同义转述。

　　Question 22

　　答案：C

　　定位原文：…but different biofuels use different processes and if we give a general description, there's a risk we'll get it wrong. And then the tutor might mark us down.

　　解题思路：I’ve got some notes here about the process of turning plant-matter into ethanol…这句话说是Mike说的自己关于乙醇生产过程的笔记，提示下文Karina即将解释她为什么不想讨论乙醇生产，定位到but different biofuels … mark us down，对应C选项。C选项中的may not provide accurate description是对if we give a general description, there is a risk we’ll get it wrong的同义转述。description，描述。

　　Question 23

　　答案：B

　　定位原文：production of corn ethanol uses up more fossil fuel energy than the biofuel energy it eventually produces. For that reason, I’d say it was more harmful to the environment.

　　解题思路：I'd rather we focus on the environmental issues， 提示下文将讨论出最环保的生物燃油原料，定位到production of corn ethanol…to the environment，more harmful是在与sugar cane(甘蔗)这句话后面Mike用You're probably right表示了肯定，所以正确答案是B，corn。注意在这句话之前，Karina还说了一句Of all of them, canola is probably the least harmful，所以注意这里canola是最环保的，与答案所要求的正相反，不要混淆。

　　Question 24

　　答案：A

　　定位原文：The problem is that it still has to be transported by trucks or rail because they haven’t built any pipelines to move it.

　　解题思路：In the USA, I wouldn't say that farmers are having problems，这句话是Karina说的， 提示下文Mike对于美国生物燃料工业发展表示出的不同看法，定位到The problem is that it still has to be transported by trucks or rail because they haven’t built any pipelines to move it，对应A选项。A选项中，inadequate是对they haven’t built any的同义转述;infrastructure(基础设施)是对pipelines(输油管道)的概括。rail在这里是“铁路，铁道”的意思。

　　Question 25

　　答案：C

　　定位原文：As the population grows, and there are more vehicles on the roads and there’s more machinery, surely they can’t depend so much on sugar cane?

　　解题思路：But Brazil's probably in the lead as far as biofuels are concerned… 提示下文Karina即将讨论巴西的甘蔗生产会怎样，定位到as the population grows, … so much on sugar cane? 这句话是Karina的质疑，这句话的大意思是“随着人口、交通工具、机器的增多，不能只依赖甘蔗生产能源”，对应C 选项。machinery, 机器，机械。

　　Question 26

　　答案：C

　　定位原文：They won't replace fossil fuels until we can find ways to produce them cheaply and quickly and with less cost to the environment.

　　解题思路：we probably won't see an increase in biofuel use 提示下文要对于增加生物燃料的使用作出结论，定位到they won't replace…less cost to the environment，这句话的大意是“只有当我们找到生产生物燃料更便宜更快并且对环境无害的方法，生物燃料才会取代化石燃料”，C选项正是这句话意思的同义转述。more energy-efficient是cheap and quick with less cost to the environment的同义转述。

　　Question 27

　　答案：(global) hunger

　　定位原文：but the biggest issue related to biofuels is that land is now being used to grow biofuels crops - and that's contributing to global hunger.

　　解题思路： so in the last section of the presentation, what problems are we focusing on? 提示下文即将讨论到讲解末尾要关注的问题。第一个关注的问题定位到but the biggest issue related to biofuels is that land is now being used to grow biofuels crops - and that's contributing to global hunger。这句话的大意就是因为土地都被用来种燃料作物了，给人吃的粮食田地就少了，于是全球化饥荒就是一个很严重的问题。

　　Question 28

　　答案：pollution

　　定位原文：The way that biofuel crops are grown and harvested still produces a great deal of pollution.

　　解题思路：The other thing is that in some countries, 提示即将讨论到讲解结尾关注的第二个问题。第二个关注的问题定位到the way that biofuel crops are grown and harvested still produces a great deal of pollution，这句话的大意是生物燃料作物的丰收方式还制造了大量的污染。

　　Question 29

　　答案：wood

　　定位原文：Some companies are exploring the possibility of using wood.

　　解题思路：Why don't we talk about the potential new sources of biofuel，提示下文将谈到两种新的生物燃料来源分别是什么。第一个来源定位到Some companies are exploring the possibility of using wood。explore，探索。

　　Question 30

　　答案：grass(es)

　　定位原文：I read that. And grasses.

　　解题思路：Yes, and algae is another possibility，提示下文将讨论除了algae(藻类植物)，还有哪一种生物燃料新来源，第三个来源(因为algae已经在题目中给出，实际上算第二种来源)定位到And grasses。句子很短，听到grasses要马上写下来。try out，试用，试验。

　　另外有一则好消息，针对雅思备考，