阅读理解。

     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 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.

1. The Internet has a history of ________ years.

A. about 40           

B. less than 30

C. more than 45      

D. nearly 35

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    

D. develop new softwares

3. The Internet was widely used in the ________.

A. 1960s  

B. 1970s    

C. 1980s    

D. 1990s

4. The underlined words "get on-line" in Chinese mean ________.

A. 上机    

B. 上网

C. 接线    

D. 买电脑