Question

【題目】Listen to the passage and complete the following sentences.（聽短文，完成下列內(nèi)容。每空格限填一詞。）

【1】We all know that nearly 3/4 of the earth is _______ _______ water.

【2】We can’t use _______ _______ the water because some of it has been polluted.

【3】We should _______ _______ the ways to reuse water.

【4】Today, in most large cities, water is used _______ _______ and then runs to the sea or rivers.

【5】Scientists are trying to find a _______ _______ of doing it.

Answer 1

【答案】

【1】 covered with

【2】 all of

【3】 find out

【4】 only once

【5】 cheaper way

【解析】

【原文】

The world is very thirsty now. We all know that nearly 3/4 of the earth is covered with water. However, we are still short of water. Why? Because about 97% of water on the earth is sea water and we can’t drink or use it for watering plants directly. Man can only drink and use the 3% -- the water that comes from rivers and lakes. And we can’t even use all of that, because some of it has been polluted.

Now more water is needed. The problem is “Can we avoid a serious water shortage in the near future?” First, we should all learn how to save water. Secondly, we should find out the ways to reuse it. Scientists have always been making study in this field. Today, in most large cities, water is used only once and then runs to the sea or rivers. But it can be used again. Even if every large city reused its water, still there would not be enough.

What would people turn to next? The sea seems to have the best answer. There is a lot of water in the sea. What we need to do is to get the salt out of the sea water. This is expensive, but it’s already in use in many parts of the world. Scientists are trying to find a cheaper way of doing it. So you see, if we can find a way out, we’ll be in no danger of drying up.