用方框中所給詞填空。

　　Many people are surprised when they find the Internet(因特網(wǎng))was(1)________ up in the 1960s．At that time, computers were large and expensive．Computer networks(網(wǎng)絡(luò))didn't work well．If one computer in the network(2)________ down, then the whole network stopped．So a new network(3)________ 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,(4)________ could be sent through another part．In this way computer network system would(5)________ on working all the time．

　　At first the Internet was only used by the government, but in the early 1970s, universities(大學(xué)), hospitals and banks were(6)________ 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(7)________ and easier to use．

　　Today it is easy to get on-line(上網(wǎng))and it is said that(8)________ of people use the Internet every day．Sending e-mail is more and more popular(9)________ students．

　　The Internet has now become one of the most(10)________ parts of people's life．

答案：
解析：

1．set　2．broke　3．system　4．information　5．keep　6．a(chǎn)llowed　7．cheaper　8．millions　9．a(chǎn)mong　10．important


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