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.

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.

What makes the world become smaller ? Some inventions . It began in the 11^th 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 11^th 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 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 in 1903 . Air travel has made the faraway places suddenly become a lot closer .

Satellites（衛(wèi)星）: The Soviet Union sent up the world’s first satellite in 1957 . This began 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 .

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The world itself is becoming much smaller by using modern traffic and modern communication means(交流方式). Life today is much easier than it was hundreds of years ago, but it has brought new problems. One of the biggest is pollution. To pollute means to make things dirty. Pollution comes in many ways. We see it, smell it, drink it and even hear it.
Man has been polluting the earth. The more people, the more pollution. Many years ago, the problem was not so serious because there were not so many people. When the land was used up or the river was dirty in a place, men moved to another place. But this is no longer true. Man is now slowly polluting the whole world.
Air pollution is still the most serious. It’s bad to all living things in the world, but it is not only one kind of pollution. Water pollution kills fish and pollutes drinking water. Noise pollution makes us become angry more easily.
Many countries are making rules to fight against pollution. They stop the people from burning coal in houses and factories in the city, and from blowing dirty smoke into the air.
The pollution of SO2 is now the most dangerous problem of air pollution. It is mostly caused by heavy traffic. It is certain that if there are fewer people driving, there will be less air pollution.
The earth is our home. We must take care of it. That means keeping the land, water and air clean. And we must try to control the growth of population at the same time.

1. 1.

   Our world is becoming much smaller ______.

   1. A.
      because the earth is being polluted day and night
   2. B.
      because science is developing
   3. C.
      because of the rise in population
   4. D.
      because the earth is blown away by the wind every year
2. 2.

   Thousands of years ago, life was______it is today.

   1. A.
      much easier than
   2. B.
      as easy as
   3. C.
      as hard as
   4. D.
      much harder than
3. 3.

   Pollution comes in many ways. We can even hear it. Here “it” means______ .

   1. A.
      water pollution
   2. B.
      air pollution
   3. C.
      noise pollution
   4. D.
      rubbish
4. 4.

   What is the most dangerous problem of air pollution?

   1. A.
      CO₂
   2. B.
      H₂O
   3. C.
      SO₂
   4. D.
      CO
5. 5.

   Air pollution is the most serious kind of pollution because_______ .

   1. A.
      it’s bad to all living things in the world
   2. B.
      it makes much noise
   3. C.
      it has made our rivers and lakes dirty
   4. D.
      it makes us become angry more easily