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
The Internet has a history of ______ years.
A、about 40             B、less than 30         C、more than 45
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
The Internet was widely used in the ______.
A、1960s                B、1970s                C、1990s
The underlined words “get on-line” in Chinese mean ______.
A、上机               B、上网                 C、接线
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.