1、Unit 4 INFORMATION TECHNOLOGY课时分层作业(一).单词拼写根据首字母或汉语提示写出下列单词1Viewed from the top of Mount Tai，the sunrise was indeed a spectacle.2Stress at work is a matter of concern to staff and management.3They have a huge selection(选择) of discontinued cookers.4You obviously dont know how to behave in public!5Ima
2、ge(形象) is very important in the music world.6They added a lot of fancy footwork to the dance.7He had been honest with her but she had tricked him!8You can improve your chances of profit by sensible(明智的) planning.9I regard creativity(创造力) both as a gift and as a skill.10This question can be answered
3、only by experiment(实验).阅读理解AIf you think that Internet shopping on a Sunday gets you the best deals，then think again.Tuesday is actually the best day of the week if you want to grab a bargain，according to an exhaustive analysis of online shopping.Thursday is the second best day followed by Fridaybut
4、 Sunday is when you are least likely to make a saving.The study also looked at months and found that the preChristmas rush in November is when there are most bargains around on the weband not the January sales.US retailer(零售商) reporting service Sum All examined 3，000 companies and half a billion tra
5、nsactions(交易) as part of its report.It worked out the average discount(折扣) offered to consumers on each day of the week and over different times of the year.The best day of the week was Tuesday where savings were 4.81 percent，followed by Thursday on 4.80 percent.In third place was Friday at 4.65 per
6、cent，then Wednesday at 4.13 percent and Monday at 4.11 percent.Only the foolish would shop on a Saturday where the discounts were typically 3.84 percentand Sunday was the worst with 3.37 percent.The analysis by month is even more surprising as most people think that waiting until the postChristmas s
7、ales would yield the biggest discounts.In fact，November is when you will get the largest savings at 5.99 percent on average.January came in second at 4.95 percent，followed by May at 4.50 percent.The worst month to buy online was March where you could expect to save just 2.76 percent.Consumers and ex
8、perts have been speculating for years about the best time to shop online.Booking a flight has almost become a science with some claiming that buying six weeks before you travel guarantees you the best price.However，a recent analysis by the US Airlines Reporting Commission found that was not actually
9、 the case.Not only did the sixweek window fail to pile up，in some cases the best fares were on sale as long as 24 weeks before departure.The ARC said that booking well in advance is best advised for busy routes or long haul flights(长途航班)，as the price only tends to go up.【语篇解读】也许你认为周日是网上购物的最佳时间，然而调查发
10、现周二才是最佳网上购物时间。1If a buyer wants to buy cheap goods online，hed better go to the shop on _ATuesdayBThursdayCFriday DSundayA推理判断题。根据文中第一段前两句叙述可知选A。2Most web sellers often provide bargain on the web _.Aafter New Years DayBduring Valentines DayCon Mothers DayDbefore ChristmasD细节理解题。根据第二段“The study also l
11、ooked at months and found that the preChristmas rush in November is when there are most bargains around on the weband not the January sales.”一句可知D正确。3Which of the following statements is True according to the third paragraph?AThe best day of the week was Tuesday where savings were 4.8 percent.BIn th
12、ird place was Thursday where savings were 4.65 percent.CSunday where the discounts were 3.37 percent was the worst.DCustomers can get the best savings on Saturday.C推理判断题。根据第三段所列数据可知周日的折扣最低。4What is the meaning of the underlined word “speculating” in the fifth paragraph?AQuarrelling.BObjecting.CSearc
13、hing.DConsidering.C词义猜测题。根据后面提到的“最佳网上购物时间”可知应该是“寻找”。BTeenagers are damaging their health by not getting enough sleep because they are distracted(分散) by electronic products in their bedrooms，according to a survey.UK advice body The Sleep Council said “junk sleep” could rival(比得上) the consumption of u
14、nhealthy junk food as a major lifestyle issue for parents of teenage children.It brings no less harm than junk food to ones health.Its survey of 1，000 teenagers aged 12 to 16 found that 30 percent managed just 4 to 7 hours of sleep as opposed to(形成对照) the recommended 8 or 9 hours by the experts.Almo
15、st a quarter said they fell asleep more than once a week while watching TV，listening to music or using other electronic products.“This is an extremely worrying situation，” said Dr.Chris Idzikowski of the Edinburgh Sleep Centre.“What we are seeing is the appearance of junk sleepthat is sleep which is
16、 of neither the length nor quality that it should be in order to feed the brain with the rest it needs to perform properly at school.”Nearly all the teenagers had a phone，music system or TV in their bedroom，with around twothirds possessing all three.Almost one in five of the teenage boys said the qu
17、ality of their sleep had been impacted by leaving their TVs or computers on.The survey also found that 40 percent of teenagers felt tired each day，with girls aged 15 to 16 doing the worst.However，just 11 percent said they were bothered by the lack or bad quality of sleep.“Im surprised that so few te
18、enagers make the link between getting enough good quality sleep and how they feel during the day，” Idzikowski said.“Teenagers need to wake up to the fact to feel well，perform well and look well; they need to do something about their sleep.”【语篇解读】由于时下电子产品的流行，很多青少年面临“垃圾睡眠”的威胁。本文告诫读者垃圾睡眠的危害，并建议我们睡觉前减少使
19、用电子产品。5According to the experts，teenagers should sleep _ every night.A4 to 7 hoursB8 or 9 hoursC6 or 7 hoursD7 or 8 hoursB细节理解题。根据第二段第三句“Its survey of 1，000 teenagers aged 12 to 16 found that 30 percent managed just 4 to 7 hours of sleep as opposed to the recommended 8 or 9 hours by the experts.”可知，
20、专家建议青少年的睡眠时间是8或9小时。6Which of the following is NOT true about “junk sleep”？AIts a kind of sleep with poor quality.BIts a kind of sleep with shorter hours.CIts mainly caused by the electronic products in the bedroom.DIts not as harmful as junk food to ones health.D细节理解题。根据第二段第二句“It brings no less harm
21、 than junk food to ones health.”可知，“垃圾睡眠”给人带来的危害不亚于垃圾食品，故选D项。7The underlined word “impacted” in Paragraph 4 can probably be replaced by “_”AimprovedBdestroyedCaffectedDinspiredC词义猜测题。根据画线词前后的内容可知，这句话的意思是“有接近五分之一的男生说他们的睡眠受到开着的电视机或电脑的影响”，故答案为C项。8It can be inferred from the passage that Dr.Chris Idziko
22、wski is very _ about the present situation.AworriedBsatisfiedCangryDdisappointedA推理判断题。根据第三和第五两段中Dr.Chris Idzikowski说的话，很容易判断出他对目前的情况是非常担心的。.阅读七选五While it may seem like everyone surfs the web these days，there is fine line between casually checking your social media pages and having a full blown Inte
23、rnet addiction.If you fear that you may lose interest in other aspects of your life because you prefer to be on the Internet，you may be on your way to an Internet addiction. 1 Admit you are at risk of an addiction.More and more people in the world are becoming addicted to the Internet.You are not th
24、e only one with this problem; it is becoming more and more common and more and more well known. 2 Set aside limited time for computer use.Make sure not to turn it on too many times a week.If you have a laptop，make sure to put it somewhere that you can remember but not somewhere that you see every da
25、y.Try keeping the lid closed when you are not using it; 3 If you have a desktop PC，try not to go near it or put something over it like a sheet.Call people instead of sending instant messages or texts.If you are free on weekends，call friends and ask them to go outside.This will distract you from the
26、computer. 4 Use an alarm clock or timer.Before using your computer，decide on a time limit such as 30 minutes.Set the clock or timer and make sure that you get off the computer when the time is up.Alternatively create a shutdown timer on your desktop. 5 AMake a small list of what you want to do withi
27、n that time.BWhen the computer is not looking at you you are less likely to use it.CThis can be programmed to shutdown your computer after the set time.DLuckily，there are ways to avoid living your life in front of the computer.EThis will stop you from using the Internet so often or going on to anoth
28、er page.FIf you have a problem on weekdays，phone your friends or ask for help in person.GDo not be embarrassed; find others with the same problem and help each other beat it.【语篇解读】本文讲述的是怎样避开电脑。1D根据上句“you may be on your way to an Internet addiction”结合下文提到的几个避开电脑的方法，可推知，设空处应提出有避开电脑的方法。D符合语境。故选D。2G根据上句
29、“You are not the only one with this problem; it is becoming more and more common and more and more well known.”可推知，设空处可能陈述找到和你有一样问题的人，然后一起克服。G符合语境。故选G。3B根据上句“Try keeping the lid closed when you are not using it”可推知，设空处可能陈述只要电脑关着，就会少用电脑。B符合语境，故选B。4F根据上文“If you are free on weekends，call friends and ask them to go outside.This will distract you from the computer.”可推知，设空处应该在谈论非周末时间。F符合语境。故选F。5C根据上句“Alternatively create a shutdown timer on your desktop.”可推知，设空处可能陈述设置定时关机的好处。C符合语境，shutdown timer是关键词。