高中英语人教新课标必修二Unit 3Computers【同步练习】

Unit 3 Computers
同步练习
1-20（略）
阅读下列短文，从每题所给的四个选项（A、B、C、和D）中，选出最佳选项，并在答题卡上将该项涂黑。
A
The Healthy Habits Survey(调查)shows that only about one third of American seniors have correct habits. Here are some findings and expert advice.21教育网
1．How many times did you brush your teeth yesterday?21·世纪*教育网
Finding：A full 33% of seniors brush their teeth only once a day.
Step：Remove the 300 types of bacteria in your mouth each morning with a battery operated toothbrush. Brush gently for 2 minutes, at least twice a day.
2．How many times did you wash your hands or bathe yesterday?
Finding：Seniors, on average, bathe fewer than 3 days a week. And nearly 30%wash their hands only 4 times a day—half of the number doctors recommend.
Step：We touch our faces around 3,000 times a day－often inviting germs(病菌)to enter our mouth, nose, and eyes. Use toilet paper to avoid touching the door handle. And, most important, wash your hands often with hot running water and soap for 20 seconds.
3．How often do you think about fighting germs?
Finding：Seniors are not fighting germs as well as they should.www-2-1-cnjy-com
Step：Be aware of germs. Do you know it is not your toilet but your kitchen sponge(海绵)that can carry more germs than anything else? To kill these germs, keep your sponge in the microwave for 10 seconds.21*cnjy*com
21．What is found out about American seniors?
A．Most of them have good habits.
B．Nearly 30%of them bathe three days a week.
C．All of them are fighting germs better than expected.【来源：21cnj*y.co*m】
D．About one third of them brush their teeth only once a day.21教育名师原创作品
22．Doctors suggest that people should wash their hands________.
A．twice a day B．three times a day
C．four times a day D．eight times a day
23.Which of the following is true according to the text?
A．We should keep from touching our faces.
B．There are less than 300 types of bacteria in the mouth.
C．A kitchen sponge can carry more germs than a toilet.
D．We should wash our hands before touching a door handle.21*cnjy*com
24．The text probably comes from________.
A．a guide book B．a popular magazine
C．a book review D．an official document
B
A computer virus is a computer program that is written by a malicious (怀有恶意的) author. They spread by copying themselves, then transferring onto other computers. There are around 53,000 computer viruses in existence, with a new one detected every 18 seconds. A computer virus can do everything, from popping up a short message to wiping key files, so that your computer doesn’t work. The “I LOVE YOU” virus infected up to 45 million computers, causing ￡7 billion worth of damage worldwide.
How to avoid catching a virus?
Stay calm. A computer virus isn’t dangerous until the infected e-mail is opened. Deleted items folder. Don’t open any attachment (附件) you are not sure about, even if you have a virus scanner . Read the e-mail and check that the contents of the message make sense before you open any attachment. Don’t forward any attachment to a friend without being sure it is safe.
Look out for hoaxes. There are many e-mails warning of “the most destructive virus ever”, but often these viruses don’t exist. Don’t send an e-mail about a “new virus” without checking it out. Visit sites like www.vmyths.com to check for hoaxes.
Send any e-mail that you think is infected to an anti-virus company. They can tell you whether it is a virus to anyone except the official virus companies. Mail filtering system will probably delete it anyway.
If you get a computer virus you’ll need to use a virus scanner to get rid of it. Don’t be careless just because you have a virus scanner. You will still need to keep your eyes open in case a new virus appears.
25. The computer virus can do everything except ____.
A. pop up a short message B. attack the computer users directly
C. wipe key files D copy out itself.
26. The best way to check whether it is a virus or not is to______.
A. check it by yourself B. ask your friend for help
C. use the virus scanner D. send the e-mail to an anti-virus company
27. This passage mainly tells us ___.
what is a computer virus
B. what is the damage of a computer virus
C. how to avoid getting a computer virus
D. how to delete a computer virus
C
Most children now chat daily either online or through their mobile phones. They are connecting to a huge number of other children all over the world. Some are shy "in real life" but are confident to communicate with others online. Others find support from people of their own age on relationship issues, or problems at home.
Sometimes the online world, just like the real world, can introduce problems, such as bullying or arguments. Going online is great fun, but there are also a few people who use the Internet for offensive (冒犯性的) or illegal aims. Children must be made aware of both the good things and the dangers.
To keep children safe, your management must cover the family computer. Just as you decide which TV programmes are suitable, you need to do the same for the websites and chat rooms your children visit. Remind your children that online friends are still strangers. Reminding them of the risks will keep them alert (警惕的).
Computer studies are part of schoolwork now, so it’s likely that your children may know more than you do. We get left behind when it comes to the latest gadgets and the interactive areas of websites, like chat rooms and message boards, which are especially strange. The language of chat is strange to many parents, too. Chatters love to use abbreviations (缩写) such as: atb—all the best, bbfn—bye bye for now, cul8er—see you later,gr8—great, Idk—I don't know, imbl—it must be love, kit—keep in touch, paw—parents are watching, lol—laugh out loud, xlnt—excellent! It seems like another language, and it is!
28. The passage is meant for _______.
A. children B. parents C. teachers D. net bar owners
29. Which of the following will the author probably agree with?
A. The Internet is no good for children.
B. The chat language is strange to adults.
C. Children shouldn't chat so much online.
D. The Internet is a good place for children.
30. The purpose of writing this passage is to advise _______.
A. people not to use the net language in real life
B. children not to meet online friends freely
C. teachers to have students study on computers
D. parents to protect their children from online dangers
31. In order to keep children safe online, you'd better _______.
A. choose suitable websites and chat rooms for them
B. teach them to use correct net words
C. surf the Internet together with them
D. forbid them to use the Internet
D
Shopping online in search of a bargain(便宜货)can often leave you feeling disappointed or out of pocket rather than satisfied. You can avoid this by following our simple advice：
PRODUCT—Before you look for the cheapest price you need to decide what product you actually want. You can do this by researching online，the easiest way is to Google for different products so that you can decide on what would be best for you.
SEARCH & COMPARE —You are now ready to use a comparison website to try and find out the best prices. You should never just use one comparison website，using two or more will give you a balanced view of the market. Comparison websites are necessary.
You need to first check out what kind of technology a site uses. Although the idea behind Froogle (now called Google Products)is attractive，the technology it uses is not as advanced as sites such as Kelkoo and Pricerunner. Froogle uses a regular search engine.
And don't expect price comparison sites to be a sure－fire way of getting a bargain. The sites will only show products from companies who pay them. This is not necessarily a bad thing—suppliers value their reputation(名声)and their business relationships.
AND SEARCH AGAIN—Before you buy you should search the product using a price comparison service，then try again just using a standard search engine—it might find the product with a cheaper price.21·cn·jy·com
If you use Firefox to surf the web then there's an add－on (附加的)tool that you can download which finds the cheapest price for a product for you.
It is called the Invisible Hand and it is free to download. For example，if you're shopping online at Amazon，the Invisible Hand will pop up and tell you that it is ￡56 cheaper at Dixons.
The tool will only work when you are looking at products，so it shouldn't disturb your day to day internet surfing. The add－on is supported by well－known brands(品牌)such as BT，Comet and HMV but obviously it won't search every single site out there，so it is still best to use a comparison site in addition to the tool.
32．According to the passage，how to decide what product to buy?
A．By shopping online. B．By searching online.
C．By looking for the cheapest price. D．By deciding which is best.
33．We can learn from the passage that ______．
A．we don't need to use two or more comparison websites
B．comparison websites often give us wrong views and choices
C．all the search engines are the same advanced
D．different comparison websites use different technologies
34．What's the exact meaning of the underlined phrase “pop up”in Paragraph 8？It's _____．
A．shout B．appear C．disappear D．hide
35．What's the BEST title of the passage?
A．How to Find Perfect Bargains Online
B．How to Use Search Engines
C．Different Websites in the World
D．Online Shopping's Advantage
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。
Before your child enters the teenage years, you might learn more about the physical, social and emotional changes of your child, which help you understand other changes in your child's behaviour and your relationship.
36 Try to remember what you went through, and how you felt. Use those feelings and experiences when dealing with your child.
Teenage behaviour can be frustrating, but often it's part of building independence and skills for adulthood. 37 Arguments over day-to-day issues like school problems, housework and screen time can be tough. But they're also a sign that your child is seeking independence, developing confidence.
38 . No matter what you do, you won't be able to avoid some stormy moments. But this stage of your child's life won't last forever. Keep in mind that mess during the teenage years is a side effect of its more important purpose.
39 thinking about how you might respond now is much easier than trying to come up with a reasonable strategy on the spot, especially if it involves a tricky subject.
40 Think about how you might do this ahead of time. For example, if your 13-year-old wants to go a movie with friends, you might choose to let him go but you might also want to set some boundaries so he's doing it as safely as possible.
A. Encourage independence in a safe way.
B. The teenage years aren't all smooth sailing.
C. Teenagers hold self-confidence at home against their parents.
D. Changing the way you think about teenage behaviour can help.
E. Thinking back to your own adolescence can help you relate to your child.
F. Parents should change their view that they close their minds and know little outside world.
G. It can be a good idea to plan how you'd like to settle common issues before they come up.
（生词：strategy n. 策略 boundary n. 界限 adolescence n. 青春期 issues n. 问题）
阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
The Internet seems to have become a necessary part in modern life. This is 41 the internet has a lot of 42 . To begin with, the Internet provides people 43 lots of information in a very 44 time. With this easy access 45 the Internet, searching 46 information has become easier than ever before. 47 , the Internet 48 the way people communicate 49 each other. E-mail 50 us to write to our friends and 51 letters from our friends cheaply and 52 . Furthermore, the Internet has changed business. E-commerce (电子商务) enables people to do business and go shopping at home easily and conveniently. Finally, the Internet 53 an important role in people's education.
54 , the Internet also has some 55 . Cyber crime causes a great 56 in people's property. Computer viruses bring us lots of 57 . The trash mail is always a nuisance to everyone. Worst of all, pornography (色情) may do harm to people, especially 58 people.
In a word, every coin has two 59 , but on the whole, it brings people more benefits than harm. It is suggested that a clever use 60 be made of this modern technique for the benefit of all people.
41. A. why B. because C. whether D. that
42. A. problems B. harm C. trouble D. advantages
43. A. to B. for C. with D. of
44. A. short B. long C. much D. many
45. A. of B. to C. with D. in
46. A. to B. for C. through D. off
47. A. As a result B. Luckily C. So D. Besides
48. A. stops B. keeps C. changes D. happens
49. A. with B. to C. for D. by
50. A. lets B. makes C. has D. allows
51. A. receive B. hear from C. posts D. brings
52. A. slowly B. quickly C. happily D. sadly
53. A. shows B. makes C. plays D. takes
54. A. But B. Although C. However D. If
55. A. advantages B. suggestion C. advice D. disadvantages
56. A. failure B. network C. keyword D. loss
57. A. results B. trouble C. inventions D. essays
58. A. young B. old C. rich D. poor
59. A. sources B. data C. ways D. sides
60. A. would B. could C. should D. might
第二节 阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
The Internet has become __61__ important a part of young people's life that most students use the Internet almost every hour. Most of them get useful information __62__ the help of the Internet. Some use the Internet to help find __63__ (solve) to some problems in their studies. But many students don't use it in a good way. Some play games too much, some visit websites __64__ they shouldn't go. Some students spend too much time on the Internet. As __65__ result, many bad things __66__ (arise) in the past few years. 21cnjy.com
__67__ (personal) speaking, it is important for students to use the Internet properly. Now we have a textbook, __68__ uses many examples to teach students some good ways to use the Internet.
Some students also make friends on the Internet. But __69__ you want to have a face-to-face meeting with your online friends, let your parents know and meet in a proper place. __70__， safety is the most important.
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号()，并在其下面写出该加的词。
删除：把多余的词用(＼)划掉。
修改：在错的词下画一横线，并在该词下面写出修改后的词。
注意：1. 每处错误及其修改均仅限一词；
2. 只允许修改10处，多者（从第11处起）不计分。
I as well as my family are going to New York City this weekend. I had been looking forward to go there for a long time. It is one of the modernist city in the world. There have also a lot of museums where you can learn something you can't learn it in school. I'd also like to see the Statue of Liberty and the Empire State Building. Unfortunately，the twin towers destroyed on September 11th,2001 and I would have the chance to see them by myself. Now I am getting ready for the excited trip. I bet it will be a unforgettable experience.
网购已成为很多高中生青睐的一种现代购物形式。请你以“Online Shopping”为题，并从以下三个方面，用英语写一篇短文，谈谈自己对网购的一些看法。21世纪教育网版权所有
★越来越多的高中生喜欢在网上购买商品
★网上购物可能存在的问题
★你的建议
优点：(1)网上购物很方便；
(2)网上购物价格便宜；
(3)网上购物可选择的东西多；
(4)……
(1)商品的质量问题，可能买到假货；
(2)换货很麻烦；
(3)……
？
注意：1.词数100左右；
2．可适当增加细节，以使行文连贯。
参考词汇：网店店主Internet shopping provider　假货fake goods
Online Shopping
_________________________________________________________________________________________________________________________________________________________________________
参考答案
A【解题导语】　该篇从刷牙，洗手(澡)，与细菌战斗三方面讲解了美国老年人的误区，并指明了正确的认识和做法。提醒老人应养成良好的卫生习惯。【版权所有：21教育】
21. D。细节理解题。根据Only about one third of American seniors have correct habits可知，A项错误。根据Seniors，on average，bathe fewer than 3 days a week可知，B项错误。根据Seniors are not fighting germs as well as they should 可知，C项错误。
22. D。细节理解题。根据And nearly 30% wash their hands only 4 times a day－half of the number doctors recommend可知。提示：注意破折号的作用。
23. C。细节理解题。根据Do you know it is not your toilet but your kitchen sponge海绵，that can carry more germs than anything else？可知。
24. B。推理判断题。综合语篇可推出。
B篇【解题导语】　该篇如何预防电脑病毒。
25. B．判断题。电脑病毒是一种软件，不可能对人进行功击。再从第一段They spread by copying themselves …，A computer virus can do everything, from popping up a short message to wiping key files.信息可知。2-1-c-n-j-y
26.D．事实细节题。从倒数第二自然段Send any e-mail that you think is infected to an anti-virus company. They can tell you whether it is a virus to anyone except the official virus companies.可知如何判断电脑是否感染病毒。
27. C．主旨大意题。从全文大意可知。
C篇【解题导语】　主要介绍了网络上的危险，告诫父母要保护孩子们的安全，并且提出了一些方法。
28．B．推理判断题。从第三段的“To keep children safe，your management must cover the family computer．Just as you decide which TV programmes are suitable!，you need to do the same for the websites and chat rooms your children visit．”中的your等词可以知道这篇文章针对的对象是父母。
29．B．推理判断题。从文章最后一句话可推断B项是作者同意的观点。
30．D．推理判断题。本文主要介绍了网络上的危险，告诫父母要保护孩子们的安全，并且提出了一些方法，诸如给孩子选择网站和聊天室，提醒孩子们网络上的朋友仍然是陌生人，以及要尽量地了解网络语言等，所以选D。
31．A．细节理解题。根据第三段的“．．．you need to do the same for the websites and chat rooms your children visit．”可知，父母要给孩子们选择合适的网站和聊天室。
D篇【解题导语】　该篇主要是针对网络购物的建议。
32.B．细节理解题。由第二段可知“想要决定自己真正想买的东西最容易的方式就是通过Google等搜索引擎在线搜索不同的物品，以便作出最佳的选择”。
33．D．细节理解题。由第三、四段可知A项错在don't need；B项错在wrong；C项错在the same；尤其是第四段通过例证说明不同的“比较网站”使用的是不同的搜索引擎技术。
34．B．词义猜测题。根据上下文语境可知，“如果你在亚马逊网购物时，the Invisible Hand 就将会自动出现并告诉你这个物品在Dixons网卖得便宜56英镑”。句意决定了这个短语应该表示这个the Invisible Hand 会自动出现来提示并提供帮助。
35．A．主旨大意题。由第一段开篇点题和综览全文内容及其结构后可知，本文主要提出了几种建议，以便让读者学会更好地在网上淘到廉价货。故A项最全面最准确。
【解题导语】　这是一篇说明文。作者提出了社会中的一个热点问题：如何解决父母与孩子之间的分歧，并从父母要根据自己的经历，理解孩子的一些做法；对孩子的行为举止要发展地看；对孩子的青少年时期所遇到的问题要有心理准备；要提前设想解决的办法；要给孩子一些空间等方面进行了阐释。2·1·c·n·j·y
36．E．根据本段叙述的采用个人经历过的体会，解决与孩子的一些分歧，处理好关系可知答案。
37．D．根据此处关键词behavior并结合选项可知对孩子的一些行为要从变化的观点考虑。
38．B．根据本段的关键点avoid some stormy moments可知青少年时期不可能一帆风顺。
39．G．结合本段提到的有些问题陷入其中时才解决很麻烦，可知“提前计划如何处理一些共性问题是一个好主意”。【出处：21教育名师】
40．A．结合本段提到的可以给孩子空间，但要设定界限可知，本段主题为选项A。
41．B．根据第一句可知，网络成为现代生活必不可少的一部分的原因是网络的优点。
42．D． advantage“优势；有利条件”，符合语境。
43．C．网络的优点之一是能在很短的时间内提供给人们大量的信息。provide sb．with sth．“提供给某人某物”。
44．A． in a very short time“在很短的时间内”。
45．B．由于上网方便，查询信息也变得比以前任何时候都容易。access to“接近；靠近”，是固定搭配。
46．B． search for“搜查；寻找”。
47．D．此处表示语气的加强，进一步说明网络的优点。besides意为“除此之外；而且”。
48．C．由下文可知，网络改变了人们的交流方式。
49，A．communicate with sb．意为“和某人交流”。
50．D．我们可以通过电子邮件收发朋友的信件。allow sb．to do sth．此处意为“使某人能够做某事”。
51．A．receive letters from sb．相当于hear from sb．，意为“收到某人的信”。
52．B．通过电子邮件收发朋友的信件既便宜又快速。quickly意为“快速地”。
53．C．网络对人们的教育也起着重要的作用。play a role in意为“在……中起作用”。
54．C．第一段交代网络的优点，这一段说明网络的弊端，构成转折关系，应用how，ever。but是连词，直接连接两个简单句，一般不用标点符号和连接的句子隔开。
55．D． disadvantage“缺点；弊端”，符合语境。
56．D．网络犯罪给人们的财产造成了损失。
57．B．电脑病毒给我们带来了很多麻烦。
58．A．网络上的色情会对人们有害，特别是年轻人。
59．D．每一枚硬币都有正反两面，比喻事物有利就有弊。
60．C．suggest，作“建议”讲时，后面的从句要用虚拟语气。
阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
61．so　根据空格后的形容词＋冠词＋名词的排列顺序及life后的that，可知该空填so。so ... that ...“如此……以至于”。【来源：21·世纪·教育·网】
62．With 　with the help of“在……的帮助下”。
63．solutions　所填词在句中作动词find的宾语，应用名词形式，又根据空格后的some problems，可知该空填名词复数形式solutions“解决方法”。
64．where　先行词是websites，空格后面的从句缺少地点状语，故用关系副词where引导定语从句。
65．a　 as a result“结果”。
66．have arisen　 所填词在句中作谓语，又根据句中时间状语in the past few years，可知该空用现在完成时， arise为不及物动词，故该空填have arisen。www.21-cn-jy.com
67．Personally　 personally speaking“就个人而言”。
68．which　 先行词是a textbook，指物，空格后面的从句缺少主语，故用关系代词which引导定语从句。
69．if　 根据句意“如果你想和你的网友见面的话，让你的父母知道并在合适的地方见面”可知该空填if“如果”引导条件状语从句。
70． Anyhow/Anyway　 根据句意“无论如何，安全是最重要的”可知该空填anyhow/Anyway“无论如何”。
I as well as my family going to New York City this weekend. I been looking forward to there for a long time. It is one of the modernist in the world. There also a lot of museums where you can learn something you can't learn it in school. I'd also like to see the Statue of Liberty and the Empire State Building. Unfortunately，the twin towers destroyed on September 11th，2001 I would have the chance to see them by myself. Now I am getting ready for the trip. I bet it will be unforgettable experience.
参考范文　
Online Shopping
Nowadays, shopping through the Internet has been becoming increasingly popular among senior high school students and they prefer to buy almost everything they want online. There is no denying that they can have fun and enjoy its convenience.
Online shopping, however, can sometimes bring headaches to students. For one thing, the quality of the goods may not be as good as described and it is possible for them to buy fake goods. For another, normally it is very hard for buyers to change those goods bought online, with which they are not satisfied.
Personally, I strongly hold the view that regulations and rules should be made to supervise Internet shopping providers. If so, I believe a safe and pleasant online shopping is just awaiting us.