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 Many people were surprised when the Internet was set up in the 1960s. At that time,computers were large and expensive. Computer network (网络) didn't work well. If one computer in the network broke down,then the whole network system (系统) stopped. So people needed to build a new network system. If part of the network was not working,people could use another part to send information. In this way the computer network system would keep on working all the time.

  Only the government (政府) used the Internet in the past,but in the early 1970s,universities,hospitals and banks began to use it. By the beginning of the 1990s,computers became cheaper and easier to use. Scientists also developed software that made " surfing ” the Internet more convenient (方便的) .Today it is easy to get on the Internet and it is said that millions of people use the Internet every day. The Internet has now become one of the most important parts of people's lives.

根据短文内容,选择最佳答案。

(   ) 1. The Internet has a history of         .

   A. less than thirty years

   B. more than forty years

   C. more than sixty years

   D. a century

(   ) 2. In the 1960s,only when        worked well,the network worked well.

   A. most of the computers

   B. more than half of the computers

   C. all the computers

   D. none of the computers

(   ) 3. In 1979,         could use the Internet.

   A. the government   B. hospitals

   C. universities   D. all of the above

(   ) 4. The underlined word   " software " means

   A. 硬件   B. 掌上电脑 C软件   D. 网络

(   ) 5. The passage mainly tells us         .

   A. the history of the Internet

   B. the history of the computers

   C. the use of the Internet

   D. the use of the computers

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