Question

   March 20th is World Water Day every year,  According to a report from the United Nations,more than half of the world’s major rivers have serious water   loss and are polluted. The Yellow River,the world’s fifth longest river,  

watered some of the oldest farms on earth. But now it j has a serious problem. 1       In most of the past 35 f years,it didn’t reach the sea.

  The Nile in Egypt,running 6，650 km,is the longest river in the world. 2       Now it is down to 2 billion m’ or so.Australia’s Murray River reaches the sea only every other year. One fifth ofAmerica’s Rio Grande  has no water,either.  3        

   Mostly it’s damming (筑现)and global (全球) warming that make rivers dry. 4       Now about 45,000 of them lie across the — world’s rivers. They hold back around 15% of the -world’s fresh water from running to the sea.

   Global warming is making things worse. Warmer weather takes water away. The glaciers (冰川）are becoming smaller. 5       Global warming has had certain effects on water sources (源头）.Droughts. happening around the world make people pay more attention to this fact.

根据材料内容，从下面五个选项中选出能填人文中空缺处的最佳选项，使短文意思通顺，内容完整，并将其标号填写在下面题号后的横线上。    

A. Dams hold water to irrigate (灌慨）fields and make -power. 

B. The source of the Yellow  River is drying up because  of it.

C. It used to carry 32 billion m’ of water a year.   

D. How does it happen?    

E. Its source on Qinghai-Tibet Plateau is drying up.

1.         2.         3.         4.         5.        

Answer 1

 1—5 ECDAB