We are all busy talking about using the Internet, but how many of us know the history of the Internet?

Many people are ___36___ when they find that the Internet was set up in the 1960s. At that time, computers ___37___ large and expensive. Computer networks didn’t work well. If one computer in the network ___38___ down, the whole network stopped. ___39___ a new network system（系统）had to be set up. It should be ___40___ to be used by many different computers. If part of the network was not working, ___41___ could be sent through another part. In this way computer network system would keep on ___42___ 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 ___43___ to use. Scientists had also developed software that made “surfing”（浏览）the Internet more convenient.

Today it is easy to get on-line and it is said that millions of people use the Internet every day. ___44___ e-mail is more and more popular among students. The Internet has now become one of ___45___ parts of people’s life.

We are all busy talking about using the Internet, but how many of us know the history of the Internet?
Many people are ___36___ when they find that the Internet was set up in the 1960s. At that time, computers ___37___ large and expensive. Computer networks didn’t work well. If one computer in the network ___38___ down, the whole network stopped. ___39___ a new network system（系统）had to be set up. It should be ___40___ to be used by many different computers. If part of the network was not working, ___41___ could be sent through another part. In this way computer network system would keep on ___42___ 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 ___43___ to use. Scientists had also developed software that made “surfing”（浏览）the Internet more convenient.
Today it is easy to get on-line and it is said that millions of people use the Internet every day. ___44___ e-mail is more and more popular among students. The Internet has now become one of ___45___ parts of people’s life.

When I was a boy aged twelve in South Carolina, something happened to me that made me never put any wild creature in a cage.

    We lived on one end of a forest, and every evening the mockingbirds（嘲鸟） would come and rest in the trees and __36__. There isn't a musical instrument made by man that can produce a more beautiful sound than the song of the mockingbird.

    I decided to catch a young __37__  and keep it in a cage, and in this way, I would have my own private musician.

    I finally succeeded in catching one and put it in a cage. At first, the bird was __38__, so it fluttered (扑腾) about the cage. But finally it was used to living in its new home. I felt very excited with myself and ___39___ some beautiful singing from my little musician.

    On the second day, the little bird's mother flew to the cage with __40__ in her mouth. The baby bird ate everything she brought to it. I was __41__ to see this. Certainly the mother bird knew how to feed her baby better than I did.

    The following morning when I went to see my bird, I found it __42__ on the floor of the cage. I was terribly surprised! What had happened!

    Arthur Wayne, the famous ornithologist (鸟类专家), happened to be __43__ my father at that time. After she heard me crying over the death of my bird, she explained to me. "A mother mockingbird, finding her young in a cage, will __44__ bring it poison berries (毒莓). She thinks it better for her baby to die than to lose ___45___.

Since then I have never caught any living creature and put it in a cage. All living things have a right to live free.

36. A. dance                        B. fly                           C. sing                         D. jump

37. A. bird                           B. boy                          C. fish                          D. thief

38. A. happy                        B. careful                            C. active                       D. afraid

39. A. looked forward to              B. looked out of            C. looked for                D. looked up 

40. A. water                         B. food                         C. songs                       D. diet

41. A. worried                      B. pleased                     C. bored                             D. tired

42. A. alone                         B. alive                         C. dead                        D. bad

43. A. calling                        B. visiting                     C. challenging               D. introducing

44. A. never                         B. seldom                     C. sometimes                D. ever

45. A. friends                       B. parents                     C. freedom                   D. happiness