We are all busy talking about and using the Internet, but how many of us know about the history of the Internet?

　　Many people are surprised when they find that the Internet was set up(建立) in the 1960s. At that time, computers were large and expensive. Computer networks(网络) didn’t work well. If one computer in the network broke down, then the whole network stopped. So a new network system(系统) had to be set up. It should be good enough to be used by many different computers. If part of the network was not working, information could be sent through another part. In this way the computer network system would keep on working all the time.

　　At first, the Internet was only used by the government, but, in the early 1970s, universities, hospitals and banks were allowed to use it too. However, computers were still expensive and the Internet was difficult to use. By the start of the 1990s, computers become cheaper and easier to use. Scientists had also developed software(软件) that made “surfing(浏览)” the Internet more convenient (方便).

　　Today it is easy to get on-line and it is said that millions of people use the Internet every day. Sending e-mail is more and more popular among students.

The Internet has now become one of the most important parts of people’s life.

根据短文内容，选择正确答案（10分）

1.The Internet has a history of ______ years.

A、about 40             B、less than 30         C、more than 45

2.Scientists set up a new network system to ______.

A、make the computer cheaper

B、make the system work well

C、make the computer go well

3.The Internet was widely used in the ______.

A、1960s                B、1970s                C、1990s

4.The underlined words “get on-line” in Chinese mean ______.

A、上机               B、上网                 C、接线

5.Which of the following is NOT true?

A、People had enough softwares to get on-line fifteen years ago

B、Computers are much cheaper than before.

C、Today the Internet is used everywhere.

A. The chairs may be put in twos, back to back

B. The person playing music cannot see the people in the game

C. You may use a piano or any other musical instrument﹝乐器﹞

D. When the music stops again

E. Everyone goes in the same direction

Do you know how to play a game called “Musical Chairs”？ It is easy to play and most peopleenjoy it. All you need are some chairs,some people and some way of making music. 1.， if someone can play it. You may use a tape recorder. You can even use a radio.

Put the chairs in a row.2.. A better way is to have the chairs in one row with each chair facing in the opposite direction to the chair next to it.

The game is easy. When the music starts, the players walk round the chairs .3.. Of course,  they should walk in time to the music. If the music is fast they should walk quickly. If the music is slow, they should walk slowly.

4.. When the music stops, the players try to sit on the chairs. If a person cannot find a chair to sit on， he drops out. Then， before the music starts again， one chair must be taken away.

5.， one more player will be out.

At last， there will be two players and one chair. The one who sits on the chair when the music stops is the winner.

Air is a colorless, tasteless and invisible（看不见的）gas that is around us. An “empty” drinking glass and an “empty” room, in fact, are not really empty. Each is filled with air. When the glass is filled with water, the water pushes the air out of the glass.

Air, as a gas, has no definite shape, but because it is matter, it takes up space and it has weight. It is easy to prove that air is something that takes up space. Stuff a piece of dry cloth（布）into the bottom of a glass so that it will not fall out when the glass is turned upside down. Push the upside down glass, holding straight up and down, into a jar of water till the glass is completely covered. When the glass is taken out of the water, the cloth is still dry. The air inside the glass shows that it takes up space and keeps the water from coming in.

1.Since air is matter, it has ________.

A．room , and weight as well                 B．both room and shape

C．either room or weight                    D．neither shape nor weight

2.The word “Stuff” means ______ in Chinese.

A．撕               B．盖               C．取掉             D．塞

3.The writer tells that the experiment（实验）___________.

A．is carried out in the space                 B．must be done in the lab

C．is made in the room                     D．can only be done in the open air

As we all know, the ocean moves. But waves breaking on the beach make the ocean fun. When you stand on the shore and look at the waves, it seems like the water is moving towards you. But the water is not really moving forward. The moving you see is wave energy. And wave energy comes from the wind.
Let’s think about how this works. As wave energy passes through the water, the energy makes particles （粒子） of water move up and down. Just give you an example of a wave passing under a basketball. We put a basketball on the sea. When the wind blows, a wave comes from behind the basketball. The basketball moves up to the top with the wave. Then the wave continues and leaves the basketball behind. The basketball looks lower, but it doesn’t move forward. That’s because the wave energy just moves the water which is under the basketball.
　  So why can you see a wave knock you down on the shore？When a wave moves toward the shore, the bottom of the wave slows down because it meets the ocean floor. But the top, which is called crest(浪峰), keeps moving. The different action causes the wave to fall over or break onto the shore. If a wave is very large, it carries a lot of energy when it hits the land. As time goes by, waves can break up and carry away the rocks and other things on the shore. Shorelines are changing all the time because of wave action.
【小题1】______ is really moving forward when you look at the wave.