P21-11）i am confused 2)what they all mean 3)can tell you some 4) how interesting 5) i ''ll be grateful 6)came across 7)does it mean P21-2 1) Chatting on line looks like fun , have you ever tried it ?2) How do you feel about it ?3) Oh , really ? what ''s the fun of it ?4) Wow , can you name some of them ?5) How interesting ! i should find some time to try it .P22-31) You really go online a lot , don''t you ?2) i really do love browsing the internet .3) You get to enter a completely different world without going anywhere at all .4) The most interesting things is that you can do shopping online .5) The most stimulating example is the virtual car show rooms .6) so what can people do there ?P22-11)BBS 2) Users 3) way 4) keepers %) personal P23-21) It''s about college BBS 2) It stands for Bulletin Board system .3) It''s a good way for college students to exchange information .4) It want to show the problem of personnal attacks .5) It is suggested that the users provide real names and more strict watch be carried out over the content of BBS information .P23-31) Internet shopping 2)most popular 3)online 4) 1996 5) videos 6) make use of 7) every book 8) at the webset 9) publish a new book 10) sample 11) ten times 12) usual bookshops 13) credit card 14) its business 15) in the past few years P23-41)-C 2) A 3) D 4) C 5) B P26_1.1) It can share information , conduct business and communicate with people .2) About 55 million Americans .3) It is an auction site 4) It allows families and friends to communicate at a low price and more frequently .P26-21) constant 2) sped up 3) conduct 4) benefit 5) privacy 6) education 7) access 8) digital P27-31) 22 million members 2) increasingly merging with 3) online growth 4) broadbandlinks 5) their own homes P27- 4 1) conducted 2) speeding up 3) merge 4) innovation 5) constant 6) makes it clear 7) respective 8) slow down ..