阅读理解练习

Yuki1230

The world is thirsty for water. This may seem strange to you, since about 75 percent of the earth’s surface is covered with water. But about 97 percent of this huge amount is seawater or salt water. Man can only drink and use the other 3 percent——the fresh water that comes from rivers, lakes, underground and other sources. But unfortunately, some of it has been polluted and is unfit for drinking.

However, as things stand today, this small amount of fresh water is still enough for us. But our need for water is increasing rapidly——almost day by day. Only if we take steps to deal with this problem now，can we avoid a severe worldwide water shortage in the future days . So we all have to learn how to stop wasting our precious water and try our best to protect water resources.

46. In the first line of the passage “the world” means __ .

A. human beings      B. all the plants      C. the animals     D. the whole country

47. According to the passage, __ of the earth’s water is fit man to drink .

A. about 97%         B. about 75%       C. 3%            D. less than 3%

48. Nowadays the supply of fresh water __ .

A. is not enough for us to drink         

B. has been a severe worldwide problem

C. is just sufficient for us to live on      

D. is increasing almost day by day

49. All the fresh water __.

A. is good enough to be used            

B. is polluted and can’t be used

C. can not be drunk by man, as some of it has been polluted

D. comes from underground and other water sources

50. Which of the following is true according to the passage ?

A. There is severe worldwide water shortage.

B. Nearly 75percent of the earth’s water is fit for drinking.

C. Only 3 percent of the earth’s water is fit for drinking.

D. There is still enough fresh water for people to drink.

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