单选题 Many people are surprised when they find 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 had to be set up. It should be good enough to be used by many different computers. If a part of the network was not working, {{U}}information{{/U}} could be sent through another part. In this way, 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 very expensive and the Internet was difficult to use. By the start of the 1990s, computers became cheaper and easier to use.
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.
单选题 The Internet has a history of ______ years.
  • A. less than 30
  • B. about 40
  • C. about 20
【正确答案】 B
【答案解析】[解析] 从文中第一段看出，因特网建立在上世纪60年代，至今约40年的历史了。可知答案为B。
单选题 At first computer networks ______.
  • A. worked quite well
  • B. were very popular
  • C. went wrong easily
【正确答案】 C
【答案解析】[解析] 从文中第一段看出，当时计算机网络不好，一台的网络坏了，其它的也停了。可知答案为C。
单选题 A good network system ______.
  • A. can keep on working
  • B. will stop working
  • C. will break down soon
【正确答案】 A
【答案解析】[解析] 从文中第一段可知，计算机网络不好才会经常停止工作，反过来，好的网络便应该能持续工作。可知答案为A。
单选题 Computers become cheaper and easier to use in the ______.
  • A. 1960s
  • B. 1970s
  • C. 1990s
【正确答案】 C
【答案解析】[解析] 从文中第二段倒数第一句可得出答案。可知答案为C。
单选题 The word "information" may probably mean ______.
  • A. letter
  • B. message
  • C. number
【正确答案】 B
【答案解析】[解析] 根据常识，在网络上传播的是信息。可知答案为B。