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We are all busy talking about and using the Internet (互联网), but how many of us know the h __1__
of the Internet?
Many people are surprised when they find that the I __2__was set up in the 1960s. At that time,
computers were large and e __3__. 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 had to be set up. It should be good e __4__ to be used by many different computers. If part of the network was not working,
information could be sent through a __5__ part. In this way computer network system would keep on
w__6__ all the time.
At f __7__the Internet was only used by the government, but, in the early 1970s, universities,
hospitals and banks were allowed to use it too. H __8__computers were still very expensive and the
Internet was d __9__ to use. By the start of the 1990s, c__10__became cheaper and easier to use.
Scientists had also developed software that made 'surfing' (浏览) the Internet more convenient.
Today it is easy to get on-line (上网) and it is said that m __11__of people use the Internet everyday.
Sending e-mail is more and more p __12__among students.
The Internet has now become one of the most important parts of people's life.
