1、Unit 3 Computers 同步练习(八)完型填空 Computers have done us a lot since they turned upIn the future they will play a more important part in many _1_，such as education，transport，personal lives，scientific research and _2_ Nowadays computer are being _3_in agriculture and industry _4_can help the farmers to _5
2、_ the conditions of the plants More and more computers Will come into our daily life with the _6_ of science and technology . It you want to change money or pay your electricity bills，you wont have to go to the _7_A computer and a telephone will help youIt can also help you to do the housework and i
3、t can even _8_ human voices and carry out the instructionsIt is _9_ _10_ the majority of the labor force will work at homePeople will be able to use the videophone _11_ conferencesThis can help us to save a lot of energy and _12_It is said that trains in Japan will have _14_ ，because they1l be well
4、_14_by computers，which can also tell the best _15_ between trains Computer programmes for _16_ whole texts are already we11 developedYou can _17_ the name of a certain subject and a _18_ list of book titles will _19_ on your screenYou may choose _20_ you want 1Afamilies Bfields Cfactories Dplaces 2A
5、so on Bso forth Cso on and so forth DA or B or C 3Aused Bput Cshown Dgiven 4Awhich Bthat Cand Dso 5Aform Bgrow Ccontrol Dmanage 6Aincrease Bprogress Cproduction Ddevelopment 7Aoffice Bbank Cshop Dpost office 8Aunderstand Bcarry out Chear Drecognize9Aimportant Bnecessary Cpossible Dcomplete 10Awhen B
6、why Cwhich Dthat 11Aat Bfor Cwith Din 12Amaterial Btime Cplace Dmoney 13Adriver Bsome drivers Cfewer drivers Dno drivers 14Aoperated Bdone Cmade Drun 15Aposition Bdirection Cdistance DWay 16Astoring Bwriting Cremaining Drecording17Agive Bput Ctype Dwrite 18Afirstrate Bworldfamous C Dworldwide19. A.s
7、how B. appear C. offer Dcome up 20Awhatever Bwhat Cwhichever Dwhich阅读理解A How to apply for(申请)a free mailbox? First you have to connect to the Internet and go to the homepage(主页)of the ICP providing free mailboxesThen you will find an icon showing “apply for a free mailbox”Click the icon，an agreement
8、 about the rules for using the free mailbox will appearIf you want to go，click the icon I agreeThen you have to fill in a form about your basic personal data，and the name and PIN of the mailboxThe PIN is the key to the mailboxAfter finishing these, you will get a mailbox like this：your namemail seve
9、r for example：tvguidemail：cctvcomcn“tvguide is the, name of the mailbox，and mailcctvcorncn is the name of the mail server)The mailbox is separated(分隔)into two parts by a separator，which is read asatThe former part is the name of the mailboxThe latter is the domain name(域名)of the mailsserverAn mails
10、to you will be received by the server and put into your mailboxYou can read these mails on any computer on the Internet in the world，if you have the name and PIN of the mailbox 21If you want to send or receive an email，you should first_ Abuy a computer Bfill in a form Capply for a mailbox Dgo to the
11、 post office 22When you get a FREE mailbox you can send an email_. Aat anytime Bwithout paying any money Cat anywhere Dto anyoneB Computers have many uses todayComputers can solve(解答)difficult problems and control complex machinesMany people use small computers called calculators(计算器)to solve simple
12、 arithmetic problems quicklyScientists use large computers to Solve many problems at the same time You can play games on computers，and some computers can help you learn languagesThe Kurzweil Reading Machine is a special kind of computerIt can read books for blind people T0 use the Kurzweil machine，a
13、 blind person simply opens the book and puts it face down on the scanner(扫描器)The machine 66 reads，the words on the pageWhen one page is finished，the blind person turns the page and puts the book on the scanner againThe Kurzweil machine can read in a normal voice or in a special fast voiceIt can read
14、 words with small letters，large letters，or italics(斜垂墨) Blind people like the Kurzweil machine because they can“readanything with it：newspapers, magazines，books，even typed lettersMany libraries now have Kurzweil machines for blind people to useThe Kurzweil machines can also help shortsighted childre
15、n to learn 23What is the main idea of the first paragraph? AExplaining Various uses of computers BExplaining the uses of calculators CExplaining what computer languages are DExplaining what the Kurzweil Reading Machine is24How does the Kurzwe machine read? AIn a normal voice B1n a low voice CIn a fa
16、st voiceDEither in a normal voice or in a fast Voice25Why do blind people like the Kurzweil machine? AIt can help them learn languages BIt can help them read books，newspapers，magazines，etc CIt can read in a normal voice DIt can read words with small letters，large letters or italics26What does the se
17、cond paragraph ten us? AThe way computers work BHow to use a Kurzweil machine CHow to use the scanner DThat the Kurzwe machine can read in two voicesC Until recently the chances for criminal activity(犯罪活动)on the internet have been lowHow ever，business done on the internet is growing rapidly，as peopl
18、e order books and other products all make money transactions(交易)A11 this is a strong temptation(诱惑)for hackers Hackers are of ten young people who are deeply attracted by computersThey use them to prow the internet，looking for ways to break into computer systems(系统)run by banks，telephone companies a
19、nd even government departmentsThey look for examples of credit cards(信用卡)and try to steal the numbers Recently in America，hackers have been caught testing the security(安全)system at the Pentagon，headquarter(总部)of the American Defence DepartmentBut sting the backers insist often for a dare“because its
20、 therealthough with what success nobody really knows Hackers seldom admit to(享有)a successful breakinThe first sign of a security breach(泄密)may be when a customer discovers fraudulent(欺骗)money transaction on a credit card account(账户)，and it is hard to discover it “You just dont give your credit card
21、out to anybody，says, Michael White，multimedia produce manager for clear communications，“and in the same way you should regularly change your credit card entering number，you can defeat hackers by regularly changing your Internet password(密码)If you dont，its like leaving the bank vault(金库)door wide ope
22、n The warning against hackers is out there，and the answer is obviously to choose tricky passwords and change them frequently and to watch who you pass your credit card details to27We can learn from the text that hackers _. Aare computer fans and play tricks on people on the internet Bsteal only cred
23、it cards on the internet Care mostly young computer fans Dregularly attack the computer systems28“Prowlused in the second paragraph means_ Amove quietly B. destroy Cget information Drebuild29Hackers seldom admit to a successful breakin because_ Athey are not easily caught by policemen Bthey regularl
24、y change their internet password Cits hard for them to get the information of the credit card account Dthey cant easily get the customersinternet passwords30Which of the following gives us the implication(暗示)ofbecause its there? AWhat the hackers do really exists on the Internet BThe hackers are not
25、 afraid of being caught CThe hackers succeed in prowling the internet DWhat the hackers do really surprises Michael WhiteKey:I1B fields在此处意为“领域。2 D and so on=and so forth=and so on and so forth 3A are being used意为在被用。 4C and连接两个并列谓语。 5C help sb(to)Do (sth)意为“帮助某人做 某事；control the conditions of the pl
26、ants意 为“控制植物的生长状况。 6D with the development of意为“随着 的发展。 7B“换钱交电费就要去银行。 8D recognize在此处意为“认出，辨认。 9C It is possible that意为“可能”。 1 OD 同上。 11B use sthfor sth意为“用做。 1 2B根据常识可以找出答案。 1 3D have no drivers意为“没有司机”。 14。A operated此处意为“操纵，控制。 1 5C the best distance between trains意为 “火车之问的最佳距离。 16A store在这里是“存储之
27、意。 17C type在这里指往电脑里输入信息。 18D a worldwide list of book titles表示“一 份世界范围内的书名单”。 19B appear on screen意为出现在你电脑屏 幕上。 20C whichever在此处指书单上的任何 一种书。21C 细节题。想接收e-mail，要先申请邮箱。 2 2B词义猜测题。a FREE mailbox意为“免 费邮箱”。 23A 主旨概括题。第一段主要说明计算机 有多种用途。 24D 细节理解题。据第二段，说这种计算机 先用扫描仪扫描，然后用正常的或快速的声 音读出来。 2 5B 细节理解题。有了这种电脑，盲人可以
28、读若干东西了。 26B 主旨概括题。第二段说明怎样用 扫描仪。 2 7C 细节题。从第二段首句Hackers are often young people who are deeply attracted by computers得此答案。 28A 从They look for examples of credit cards and try to steal the numbers我们得 知，这些“黑客并非想毁掉或重建计算机，； 因此B、D不合题意。在此C有较大干扰 性，在此分析looking for ways to break into computer systems run by banks在句中的作 用对选择答案极有影响，在此分词短语做 伴随状语，修饰prowl，因此我们可以推断 prowl在这里的意思是“进入”。 2 9D 从后文you can defeat hackers by regularly changing your Internet password， 我们可以推断，“黑客是靠破译因特网上 的密码进入的，然而是不容易破译的，因此 D为最佳答案。 30A Its there在这里表示“存在。
