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 we are 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 out the water that you used to wash vegetables or fruits. You can use it fo 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，选择正确答案。

(   ) 1. About_____ of water on earth is sea water.

A.  30%       B.97%

B.  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 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 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 should we do to save water

D.  what's fresh water

Answer 1

1. B  由第一段最后一句"Because about3% 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"first,second"可知是两条建议被提到。

3. A  由第二段中"people should... reuse

it."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如何解决，故选A。