听力练习

精听建议：

先完整地把一条新闻听一到三遍，争取掌握大意。然后，一句一句精听，力争每句话都听明白。遇到实在不懂的地方，再听写。

下面的文本材料中空缺部分里面要填的词都很简单，不过是一些值得注意的连读或者典型的美式发音哦，有些语速比较快。试试看，你能不能全部写对？

（参考文本，欢迎指正^^）

Lesson25 Power

There is not enough petrol in the world for everybody now, and each year there is 1 , so what are we going to do when it finishes? Perhaps we will go back to 2 and bicycles.

In the Second World War, some people did not use petrol in their cars. They made 3 from wood and plants instead, and then they put it in big bags on top of their cars. The cars did not go fast, but it was better than nothing. We cannot cut down all our trees to make gas; we need them for other things too.

Besides gas, we can also use 4 for our cars, but first we must make the electricity! Some countries have coal, and they make electricity with that, but we will not always have coal. Other countries have great rivers, which turn turbines and generate electricity more easily and cheaply.

We are also able to get power from the tides. We put turbines in the mouth of a river. Then, when the tide 5 , it turns the turbines, and when it runs back towards the sea, it turns them again. We know that the waves of the sea can also turn turbines when they go up and down. Will all of these things generate our electricity in the year 2050?

■填空答案■

中文翻译

能源
现在世界上没有足够的汽油供应每个人，并且每年都在减少，那么汽油用完后我们打算怎么办？或许我们将回头使用马、马车和自行车。

在第二次世界大战中，有些国家的汽车不使用汽油。他们用树木和植物制造天然气，然后将天然气放进汽车顶上的大袋子里。这种汽车跑不快，但总比没有好。我们不能砍倒所有的树来制造天然气；我们还需它们做别的事情。

除了天然气，我们还可以在汽车上使用电能，但首先我们必须发电！有些国家有煤，因此他们用煤发电，但我们不会一直有煤。别的国家有大河，可以驱动水轮机发电，这比较容易和廉价。

我们也能从潮汐中获得能源。把水轮机放在河口，然后当潮水上涨的时候，它能驱动水轮机，而退潮时，又能驱动水轮机。我们知道大海的波浪在涨落时也能使水轮机旋转。所有这些能不能提供我们2050年所需的电力呢？

重点词汇语法

1.We cannotcut downall our trees to make gas; we need them for other things too.

我们不能砍倒所有的树来制造天然气；我们还需它们做别的事情。

cut down的意思为“砍到”，例如：

His work is tocut downtrees for the factory.

他的工作就是为工厂砍树。

另外，cut down还可以表示“降低，减少”的意思，例如：

The new policy helpscut downthe traffic accident rate.

新政策的出台降低了事故率。

2.Other countries have great rivers, which turn turbines andgenerateelectricity more easily and cheaply.

别的国家有大河，可以驱动水轮机发电，这比较容易和廉价。

generate的意思为“产生（光，电，热等）”，例如：

Water power is being used togenerateelectricity.

水能被用来发电。

另外，generate还可以表达“产生，导致”的意思，例如：

Tourismgeneratesa lot of new job opportunities for the country.

旅游业为国家产生了很多新的就业机会。