unit 4 cyberspace
i. 课文回顾：
l summary of lesson1
in the last thirty years, the internet has grown rapidly. the number of computers c__________ to the internet has grown from 200 to 50 million and this g_________ is clearly going to continue.
some people are p_________. they worry about the c________ in cyberspace and they are afraid that in the future hackers can get in to the computers of banks and government, what’s more terrorists may a_________ the world’s computers, c_______ chaos and make planes and trains c_________.
however, many other people are o__________. today people can get all s_______ of information from the internet. we are going to see a huge growth in shopping online, such as buying books, finding o______ about the holiday o_________, booking tickets. they also believe that in the future they can even get e___________ from the internet. the tv and mail service may d_________ with the i__________ use of e-mail..
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