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 has a serious problem.    1.    In most of the past 35 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 of America's Rio Grande has no water, either.

____3.   

Mostly it's damming (筑坝) and global 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 glacier (冰川) are becoming smaller.   5.    Global warming has had certain effects on water sources (源头). Droughts (干旱) happening around the world make people pay more attention to this fact.

What makes the world become smaller? Some inventions, It began in the 11th century, But it has developed greatly in the last century. Let's take a look at the five top inventions.

Movable Type(活字印刷) :By using Movable Type, books could be printed cheaply and easily. Bi Sheng invented Movable Type in China in the 11th century.

Telephone: The inventor Alexander Graham Bell made the first telephone call in 1876." Mr. Watson, come here. I want you ,"he said to his assistant(助手) over the phone line. And with those famous words, the world was about to get much smaller.

Airplane: The Wright brothers made the first powered flight in1903.Air travel has made the far way places suddenly become a lot closer.

Satellites: The Soviet Union sent up the world's first satellite in 1957. This begin the Space Age. Satellites have helped scientists study the earth. Much of our knowledge of the world has come from the information recorded by satellites.

Internet: When the Internet was created in 1969. only a few people knew about it. But more than 650 million people in the world use it now. The Internet has made information about anything easy to get.

A.找出划线字母的正确读音（3分）

What makes the world become smaller? Some inventions, It began in the 11th century, But it has developed greatly in the last century. Let’s take a look at the five top inventions.
Movable Type(活字印刷) :By using Movable Type, books could be printed cheaply and easily. Bi Sheng invented Movable Type in China in the 11th century.
Telephone: The inventor Alexander Graham Bell made the first telephone call in 1876." Mr. Watson, come here. I want you ,"he said to his assistant(助手) over the phone line. And with those famous words, the world was about to get much smaller.
Airplane: The Wright brothers made the first powered flight in1903.Air travel has made the far way places suddenly become a lot closer.
Satellites: The Soviet Union sent up the world’s first satellite in 1957. This begin the Space Age. Satellites have helped scientists study the earth. Much of our knowledge of the world has come from the information recorded by satellites.
Internet: When the Internet was created in 1969. only a few people knew about it. But more than 650 million people in the world use it now. The Internet has made information about anything easy to get.