Someone is singing next door, but you feel unhappy because her singing is terrible. So you think she is just making noise. We know that too much noise makes people feel terrible.
Scientists are still trying to find out more about noise, but already it is known that a noise of over 85 decibels(分贝) can make some people tried and anxious(焦虑的).
In the past we thought only workers in very noisy places became deaf easily. Today, scientists believe that 10% of all workers in Britain become deaf in their work.
There are also new dangers from noise. Pop music, for example, can reach 120 decibels when it is played loudly five feet away! Only a plane can make such loud noise when it takes off.
There was an experiment in the United States. Some people would be given a lot of money if they stood below a jet when it was taking off over their heads. No one got the money after the jet flew past because all of them died in the noise.
People can’t pay their attention on what they are doing when there is much noise. Workers in noisy offices, for example, do their work more slowly than workers in quiet offices. Another study shows that workers in factories can do dull(枯燥的) jobs better when lively music is played for them. 

The Special Satellites
Man has invented four kinds of satellites. The first kind of satellite studies the__1__of the earth. They are used to make maps. They also help countries to see where they may__2___ oil or gold. The second kind of satellite is used to guide ships and planes. A ship or a plane can _3__a message to the satellite, and the satellite can find out __4___ the ship or the plane is.
The third kind studies the weather. These satellites_5__ the cloud and strong winds moving across the earth. They warn countries to make preparations when _6__ weather is coming.
___7__kind is used for communication. Telephone calls__8_countries can be sent by these satellites. Some can carry hundreds of calls at the same time. The call is sent to the satellites, then the __9__sends it to the station in the country and the country is being phoned. These satellites also carry pictures, they can receive and send __10__at a time, which we can watch on TV.

Someone is singing next door, but you feel unhappy because her singing is terrible. So you think she is just making noise. We know that too much noise makes people feel terrible.

Scientists are still trying to find out more about noise, but already it is known that a noise of over 85 decibels(分贝) can make some people tried and anxious(焦虑的).

In the past we thought only workers in very noisy places became deaf easily. Today, scientists believe that 10% of all workers in Britain become deaf in their work.

There are also new dangers from noise. Pop music, for example, can reach 120 decibels when it is played loudly five feet away! Only a plane can make such loud noise when it takes off.

There was an experiment in the United States. Some people would be given a lot of money if they stood below a jet when it was taking off over their heads. No one got the money after the jet flew past because all of them died in the noise.

People can’t pay their attention on what they are doing when there is much noise. Workers in noisy offices, for example, do their work more slowly than workers in quiet offices. Another study shows that workers in factories can do dull(枯燥的) jobs better when lively music is played for them. 

The Special Satellites

Man has invented four kinds of satellites. The first kind of satellite studies the__1__of the earth. They are used to make maps. They also help countries to see where they may__2___ oil or gold. The second kind of satellite is used to guide ships and planes. A ship or a plane can _3__a message to the satellite, and the satellite can find out __4___ the ship or the plane is.

The third kind studies the weather. These satellites_5__ the cloud and strong winds moving across the earth. They warn countries to make preparations when _6__ weather is coming.

___7__kind is used for communication. Telephone calls__8_countries can be sent by these satellites. Some can carry hundreds of calls at the same time. The call is sent to the satellites, then the __9__sends it to the station in the country and the country is being phoned. These satellites also carry pictures, they can receive and send __10__at a time, which we can watch on TV.

1.                A．physics         B．chemistry       C．biology   D．geography

2.                A．carry          B．find            C．keep D．choose

3.                A．write          B．take           C．send D．bring

4.                A．where         B．what           C．which    D．that

5.                A．have           B．watch          C．notice    D．see

6.                A．sunny          B．cool           C．bad  D．fine

7.                A．The last         B．Other          C．One D．Another

8.                A．among         B．along           C．between  D．of

9.                A．TV             B．telegraph       C．telephone D．satellite

10.               A．plays          B．programs       C．films  D．languages

Scientists have always wanted to know more about the other world in the space.

Years ago they knew a lot about the moon, They knew how big it is and how far away it is from the earth. But they wanted to know more about it. They thought and thought. At last they found the only way to send men to the moon.

The moon is about 384,000 kilometers away from the earth. A plane can not fly to the moon because the air reaches only 240 kilometers high above the earth. Then there is no air. But something can fly even when there is no air. That is rocket. Rockets can fly out into space. Rockets with men in them have already reached the moon. Some rockets without men I them have flown to other parts, much farther away than the moon in the universe. One day rocket may be able to go to any place.

根据短文内容, 回答下列问题

1.Why do scientists want to send men to the moon?

Because they want to                   about the moon.

2.How far is the moon away from the earth?

It’s about                     away from the earth.

3.Why can’t a plane fly to the moon?

Because                              .

4.How do people reach the moon?

They can reach there                      .

5.Where can rockets go?

One day rockets may be able to go to                   .