Question

  As we know,we are short of water. It seems strange that about 3/4 of the surface of the earth is covered with water, but why are we still short of water? Because about 3% of water on the earth is fresh water which we can drink or use for watering plants directly. The rest is sea water.

  With the development of the modern society，we need more water. But how can we avoid the serious water shortage? First, we should learn how to save every drop of water. Second, we should find out the ways to reuse it. Some scientists have studied in this field for many years. Now people use water only once in most big cities. But people should use it again. For example，don't pour away the water that you have used，for you can use it to wash vegetables or fruits. You can use it to clean the floor,the windows or the toilet. Even if every large city reuses its water, we still have no enough water. What should we do next?

  The sea seems the best answer. There is a lot of water in the sea. All that we need to do is to make the salt out of sea water. But this process costs too much. Scientists are trying to find a cheaper way of doing it. If we find a proper way，we'll not worry about the danger of water shortage.

根据短文内容，选择最佳答案。

(   ) 1. About       of water on the earth is sea water.

A. 30%       B. 97%

C.3/4       D. 1/4

(   ) 2. How many tips that we need to do to avoid water shortage are mentioned in the passage？

A. 5.       B.4.
C.3.       D.2.
(   ) 3. People in most big cities should      

A.   reuse water

B.   use water once

C.   pour water directly

D.   use water to clean the floor

(   ) 4. Which is NOT true according to the passage?

A.    We are still short of water.

B.    People are always finding ways to reuse water.

C.    We have avoided water shortage.

D.    Most water on the earth is sea water.

(   ) 5. The passage is about .

A.   how to solve the water shortage

B.   how to change sea water into fresh water

C.   what we should do to save water

D.   what fresh water is

Answer 1

1. B  由第一段最后一句Because about 3% of water ... The rest is sea water.可知， 地球上97%的水是海水。

2. D 由第二段中的first,second可知两条建议被提到。

3. A 由第二段中…people should ... reuseit.可知人们应该再利用水。

4. C  由第二段中But how can we avoid ...shortage？可知我们还没能避免水短缺问题。

5. A整篇文章讲述了水短缺问题以及应该如何解决，故选A。