练习册

  • 练习册
  • 试题
    精英家教网 > 高中英语 > 题目详情
    We all know that the normal human daily cycle of activity is of some 7-8 hours' sleep alternating(交替) with some 16-17 hours' wakefulness and that the sleep normally coincides with the hours of darkness. Our present concern is with how easily and to what extent this cycle can be modified.
    　　The question is no mere academic one. The ease, for example, with which people can change from working in the day to working at night is a question of growing importance in industry where automation calls for round-the-clock working of machines. It normally takes from five days to one week for a person to adapt to a reversed（颠倒的） routine of sleep and wakefulness, sleeping during the day and working at night. Unfortunately, it is often the case in industry that shifts(轮班) are changed every week; a person may work from 12 midnight to 8 a.m. one week, 8 a.m. to 4 p.m. the next, and 4 p.m. to 12 midnight the third and so on. This means that no sooner has he got used to one routine than he has to change to another, so that much of his time is spent neither working nor sleeping very efficiently.
    　　The only real solution appears to be to hand over the night shift to a number of permanent night workers. An interesting study of the domestic life and health of night-shift workers was carried out by Brown in 1957. She found a high incidence (发生率) of disturbed sleep and other disorders among those on alternating day and night shifts, but no abnormal occurrence of these phenomena among those on permanent night work.
    　　This latter system then appears to be the best long-term policy, but meanwhile something may be done to relieve the pressure of alternate day and night work by selecting those people who can adapt most quickly to the changes of routine. One way of knowing when a person has adapted is by measuring his body temperature. People occupied in normal daytime work will have a high temperature during the hours of wakefulness and a low one at night; when they change to night work the pattern will only gradually go back to match the new routine and the speed with which it does so parallels, broadly speaking, the adaptation of the body as a whole, particularly in terms of performance. Therefore, by taking body temperature at two-hour intervals(间隔时间) throughout the period of wakefulness, it can be seen how quickly a person can adapt to a reversed routine, and this could be used as a basis for selection. So far, however, such a form of selection does not seem to have been applied in practice.
    小题1:The main problem of the round-the-clock working system lies in       .
    A．the inconveniences brought about to the workers by the introduction of automation
    B．the disturbance of the daily life cycle of workers who have to change shifts too frequently
    C．the fact that people working at night are often less effective
    D．the fact that it is difficult to find a number of good night workers
    小题2:The best solution for implementing the 24-hour working system seems to be       .
    A．to change shifts at longer intervals.
    B．to have longer shifts
    C．to arrange for some people to work on night shifts only
    D．to create better living conditions for night workers
    小题3:It is possible to find out if a person has adapted to the changes of routine by measuring his body temperature because       .
    A．body temperature is higher when the cycle of sleep and wakefulness alternates
    B．body temperature changes when he changes to night shift or back
    C．the temperature reverses when the routine is changed
    D．people have higher temperatures when they are working efficiently
    小题4:Which of the following statements is NOT TRUE?
    A．Body temperature may serve as an indication of a worker's performance.
    B．The selection of a number of permanent night shift workers has proved to be the best solution to problems of the round-the- clock working system.
    C．Taking body temperature at regular intervals can show how a person adapts to the changes of routine.
    D．Disturbed sleep occurs less frequently among those on permanent night or day shifts.

    小题1:B
    小题2:C
    小题3:D
    小题4:B

    试题分析：文章大意：本文主要介绍了24小时倒班工作存在的主要问题，并提出了某些解决办法，但都没有明显成效。
    小题1:B 细节题。根据第二段It normally takes from five days to one week for a person to adapt to a reversed（颠倒的） routine of sleep and wakefulness, sleeping during the day and working at night. Unfortunately, it is often the case in industry that shifts(轮班) are changed every week可知24小时工作制的工人们常常被频繁更换工作时间。故B正确。
    小题2:C 细节题。根据文章第二段的This means that no sooner has he got used to one routine than he has to change to another, so that much of his time is spent neither working nor sleeping very efficiently.
    可知换班时间应该延长，故C正确。
    小题3:D 细节题。根据文章最后一段的People occupied in normal daytime work will have a high temperature during the hours of wakefulness and a low one at night可知人体的体温是随着上班时间的改变而改变的，故D正确。
    小题4:B 推理题。根据文章最后一段的it can be seen how quickly a person can adapt to a reversed routine, and this could be used as a basis for selection. So far, however, such a form of selection does not seem to have been applied in practice可知选择永久的夜间值班者仅仅是一种基础的方法，但不是最佳的方法，故选B。
    练习册系列答案
    年级 高中课程 年级 初中课程
    高一 高一免费课程推荐！ 初一 初一免费课程推荐！
    高二 高二免费课程推荐！ 初二 初二免费课程推荐！
    高三 高三免费课程推荐！ 初三 初三免费课程推荐！
    相关习题

    科目：高中英语 来源：不详 题型：阅读理解

    My grandmother Adele loved culture and was generous with its gifts. When I was a child, she took me to museums, restaurants, dances. She showered me with gifts from her travels around the world. But I can only remember her giving me one book—a book that, to this day, I have not read. She presented me with her own favorite childhood book: Hans Brinker. My grandmother was happy to share this book with me. She even decorated the title page with her proud writing.
    I tried to read it. I adored reading, and would dive into a new pile of books from the library all at once. But something about Hans Brinker just wouldn’t let me in. The story was set in Holland, a long time ago. It felt dull and unfamiliar—even though I was a fan of classics of other times and places. I simply read the first pages over and over. I could not progress.
    Standing on a bookshelf in our living room, the book was like something I avoided. It scolded me for not being interested, for not trying hard enough, for disappointing my grandmother.
    The book started to fit in, almost forgotten, until Adele asked. Had I read it? Did I like it? Always determined, she wanted to know the answer. I would make some kind of excuse, feel bad, and open it again, hoping for a new reaction. The book weighed on me.
    Years passed and finally Adele and I both accepted that I would never read Hans Brinker. Eventually I cleared the book from the shelf. The Hans Brinker experience led me to set a rule that I’ve lived by ever since: Do not ask about a book given as a gift. Don’t ask, despite your desire to discuss it to grow closer. The desire for such connection is what gives book-giving with special meaning—and increases the owner’s possibility to be a letdown.
    Guilt is basically the same as for all gifts, though. If the giver doesn’t have the pleasure of seeing or hearing about the gift being enjoyed, and asks whether it is, then the owner—unless she can truthfully say “yes”—either has to admit to not liking the present, or else lie on the spot. Neither is pleasant. So, don’t ask.
    小题1: When the author was a kid, his grandmother ________.
    A．took him to travel around the world a lot
    B．loved to take him to museums and stores
    C．shared her childhood stories with him
    D．gave him many gifts
    小题2:What does the author think about the book his grandmother gave him?
    A．Boring.B．Interesting.C．Puzzling.D．Disappointing.
    小题3:The underlined sentence “The book weighed on me” in Paragraph 4 probably means _______.
    A．the book is too heavy for the author to carry
    B．the author feels stressful facing the book
    C．the book is full of powerful viewpoints
    D．the author keeps reading the book
    小题4:. The author learns from the Hans Brinker’s experience that never________.
    A．give others books as gifts
    B．lie to people who give you gifts
    C．get close to others through gifts
    D．talk about the books given as gifts

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    Local businessmen are increasingly facing competition from online retailers. Larry Pollock, owner of Camera Co/Op on South Congress, said he has been dealing with this kind of problem for years, even before the Internet. The struggle began with mail-order catalogues(目录), which are similar to online retailers in that they have few employees to pay, no sales tax fees and no business venue to lease and manage.
    “Their overhead is lower, but they don’t offer a service like we do,” Pollock said.
    Pollock, however, said providing a valuable service to customers does not always guarantee continued sales.
    “We spend 30 minutes to an hour with somebody and they go home and buy it on line,” he said.
    According to the state comptroller’s office, online shopping is developing at a more rapid rate than traditional businesses.
    In spite of how fair or unfair online shopping may be to the local businessmen, consumers will continue to turn to the Internet for its variety and accessibility, said Mitch Wilson, an online shopper. “You have a larger selection and it's easier to compare prices.”
    Wilson said he built his personal computer and paid a third of the price by shopping on line.
    “Before the Internet, I would have had to go and buy an assembled computer from somebody like Dell,” he said. “Before I started shopping on line I could never find all the pieces I wanted. No single store had everything needed, so shopping on line saved me from having to buy from Dell.”
    Janny Brazeal, a psychology freshman, said online shopping is too impersonal.
    “’d rather see it in person, touch it, know that I’m getting it,” she said.
    Brazeal also said she would not give out her credit card number or other personal information on line no matter how safe the site claims it is.
    小题1:Larry Pollock has been facing the problem _____.
    A．before long
    B．after the Internet
    C．since there were mail-order catalogues
    D．since he worked as a businessman
    小题2:According to the passage, which of the following is WRONG?
    A．Traditional business can provide valuable ser- vices to customers.
    B．People can get cheaper goods from traditional business.
    C．More and more people will turn to the Internet for their needs.
    D．There are still many people who don’t like on- line shopping.
    小题3: Mitch Wilson prefers to build his personal compu- ter by shopping on line because _____.
    A．he can easily get what he needs at a lower price
    B．he can not get the price at traditional businessman
    C．he is not satisfied with the service of local busi- nessman
    D．the quality of Dell is not satisfying

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    As the new semester begins，millions of college students across the country are trying hard to remember how best to write a paper-or，more likely，how best to delay that paper．
    Procrastination is the thief of time and a lot of students suffer from it．They can spend whole days in the library doing nothing but staring into space，eating snacks，surfing the Internet，watching videos and looking at their pretty peers sitting around them，who，most likely，are doing nothing either．
    Paralyzed by their habit to procrastinate，they write micro blogs about their fears，asking their online friends if they sometimes have the same issue．But this does nothing to solve their problems．
    According to a recent report by the BBC，95 percent of us procrastinate at some point and 20 percent of the world’s population are procrastinators，complicating their lives with their continual delaying of tasks．
    Procrastinators like to find excuses to justify their behavior，but BBC columnist Rowan Pelling says they are all wrong．Many procrastinators tell themselves they are perfectionists who work best under pressure．Pelling says this is nonsense，as work done at the last minute is more likely to have mistakes than work done on time．
    She says the behavior of procrastinators often makes them feel flustered and ashamed，inconveniences others，and annoys loved ones．
    Fortunately，social seientists have made tireless efforts to understand this behavioral shortcoming and offer strategies to control it．Piers Steel，a Canadian social scientist and author of The Procrastination Equation，believes humankind is“designed”to procrastinate．Nevertheless，he suggests a couple of good ways to get through the task at hand．
    The first one is obvious：Break the task down into small pieces and work your way through them methodically．
    The second is clever：Give a trusted friend a sum of money and tell them that if you don’t complete the task you have undertaken by a specific time，they can keep it or donate it to a cause you hate.
    小题1:What does the underlined word“Procrastination” in the second paragraph refer to?
    A．A bad habit of putting work or tasks off．
    B．A thief who steals time and money in college.
    C．A college student who learns nothing．
    D．A study way of doing nothing in the library.
    小题2:Which of the following statements is true according to the text?
    A．College students can have their papers written if they delay them．
    B．Many students don’t know what to do in the library．
    C．Students can’t solve their procrastination by writing micro blogs．
    D．20％of the procrastinators make their life complicated．
    小题3:According to Rowan Pelling，we can learn that procrastinators .
    A．can find reasonable excuses for their behavior
    B．are able to work best under pressure
    C．are more likely to avoid mistakes at work[]
    D．may upset themselves and their loved ones more frequently
    小题4:Which of the following may Piers Steel support?
    A．Human beings are not born to be procrastinators．
    B．Complete your tasks or work step by step．
    C．Give your trusted friend money and ask him to help you finish your tasks．
    D．You can’t control procrastination but you can avoid it．
    小题5:What’she best title of the text?
    A．Who steals my time?
    B．The solutions to procrastination
    C．I’ll do it tomorrow，I swear!
    D．Don’t do nothing!

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    The popular US drama series “House of Cards”, which has already started its second season, features Chinese elements in its storyline. Traditional heroes are no longer sought after anymore. Today, it’s unconventional leading figure -like Francis J. Underwood from “House of Cards” who are winning audiences’ hearts.
    The political drama, which airs on the Internet service Netflix, has won the applauses of viewers around the world since its debut(首次亮相) on February 1, 2013. And it has caught the attention of real politicians, including US President Barack Obama.
    Kevin Spacey plays Francis J. Underwood, a cold-blooded Democrat who moves his way up the political ladder by any means necessary. He often uses his under-exposure in media to carry out misdeeds that will later benefit him.
    The revenge(报仇) theme plays a heavy role throughout the storyline, Underwood, who had high hopes for an appointment as Secretary of State in the first season, was betrayed by the US President and his former colleagues. He and his wife then conducted a plan of revenge and swore to unseat those who turned their backs against him. Through their plan, Underwood’s own hunger for power grew and empowered him to get rid of whoever stood in his Way.
    The release of the trailer(预告片) of the second season excited millions of viewers around the world, including US President Barack Obama, who has been a loyal fan since the series debuted. Obama expressed his admiration for Underwood. “This guy’s getting a lot of stuff done,” he said. Although the President is anxious to watch the story unfold, he’d like to do it at his own pace. After the release of the second season on February 14, 2014, Obama sent words on his Twitter account, “Tomorrow: @HouseOfCards. No spoilers , please.”
    The second season has promised to be darker, with more unexpected turnouts, and is to include more Chinese elements. “Perhaps the team, including myself, has realized that in the next decade, Asia will be an extensively important region, and China will play an active role in its transition and change,” says Spacey.
    小题1:The second season is different in that _____.
    A．it is a political drama
    B．more Chinese elements are involved
    C．it has caught the attention of US President Barack Obama
    D．Kevin Spacey, a cold-blooded Democrat, plays Francis’J. Underwood
    小题2:The 3rd and 4th paragraph mainly deal with ______.
    A．the plot of the drama series
    B．the background of the drama series
    C．the characters of the drama series
    D．the popularity of the drama series
    小题3:The author may agree that ______.
    A．the second season is expected to be darker with more deaths
    B．audiences lose their heart to traditional heroes in the drama
    C．the drama is the reflection of politics of America in real life
    D．the drama has won the recognition of viewers since its first season
    小题4:The message sent by Obama on his Twitter account proves that he_______.
    A．doesn’t wish to be told what to do as a drama fan
    B．adores the drama so much that he wants to watch it in advance
    C．doesn’t want to be disturbed while watching the drama
    D．hopes nobody will inform him of the plot of the drama in advance

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    A tent can be one of the more costly items on your camping equipment shopping list. It is definitely something that you need to consider carefully.
    By seeing a tent for real you will be able to get a better impression of its size and construction in the traditional shop. However，the downside is that，unless you are experienced，you may miss out some of the details that the manufacturer’s promotional material makes clear. Cheap tents often look similar to the quality models they are mimicking(模仿)，but you can be sure that they use inferior(次的) materials and probably have lower design standards.
    Shop staff are often campers themselves. That means they usually can give lots of advice. If a shop assistant agrees with your own conclusions，that will be great；if they try to change your decision with a clear and reasonable argument，then that will be worth considering；if they just try to bamboozle(欺骗)，or even bully，you then walk away.
    The Internet is a wonderful tool，and so long as you know how to make the most of search engines and put in a little effort，you really have the perfect answer waiting to be found. That answer will be different for every camper as each of us has different needs. Don’t be surprised to see your favorite criticized somewhere，but if you see too much criticism，then you had better start thinking again. No problem. You won’t have spent anything yet，so think of it positively as a large expense saved.
    Probably the best approach，if you have the time，is to research tents online and make a short list. Then try to inspect those tents at nearby shops. Then you can make a final decision on where to buy your chosen model based purely on total cost.
    小题1:The underlined word “downside” in Paragraph 2 means “________”．
    A．disadvantageB．instructionC．argumentD．principle
    小题2:It can be concluded from the third paragraph that________.
    A．shop assistants usually enjoy going camping
    B．shop assistants usually have practical advice
    C．you should consider your idea repeatedly
    D．it is impolite for you to trouble shop assistants
    小题3:You can make use of the Internet to________.
    A．meet your different needs
    B．find the answer for every camper
    C．help you out of trouble
    D．find your favorite tent
    小题4:Which of the following would be the main idea of this passage?
    A．It is good to buy your tent in the traditional shop.
    B．You’d better buy a tent with the help of the Internet.
    C．Better buy a tent combining seeing tents for real in shops and researching them online.
    D．Going camping is really beneficial to your health.

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    In today’s world, almost everyone knows that air pollution and water pollution are harmful to people’s health. However, not all the persons know that noise is also a kind of pollution, and that is harmful to human health, too.
    People who work and live under noisy conditions usually become deaf. Today, however, scientists believe that 10 percent of workers in Britain are being deafened by the noise where they work. Many of the workers who print newspapers and books, and who weave（织） cloth become deaf. Quite a few people living near airports also become deaf. Recently it was discovered that many teenagers in America could hear no better than 65-year-old persons, for these young people like to listen to pop music and most of pop music is a kind of noise. Besides, noise produced by jet planes or machines will make people’s life difficult and unpleasant, or even make people ill or even drive them mad.
    It is said that a continuous noise of over 85 decibels（分贝） can cause deafness. Now the governments in many countries have made laws to control noise and make it less than 85 decibels.
    In China, the government is trying to solve not only air and water pollution problems but also noise pollution problems.
    小题1:The passage is mainly about ______ .       
    A．air pollution B．water pollutionC．noise pollutionD．world pollution
    小题2:According to the passage, a continuous noise of _______decibels can make people deaf.
    A．less than 85B．less than 65C．about 65D．more than 85
    小题3:10 percent of the workers in Britain are being deafened because _______ .
    A．they are working in noisy places
    B．they often listen to pop music
    C．they live near airports
    D．they are too busy to listen to others’talk
    小题4:The government of China is trying to reduce ______.
    A．only the air pollution
    B．only the air and water pollution
    C．only the water pollution
    D．the air, water and noise pollution
    小题5:According to the passage,which of the following statement is TRUE?
    A．People working and living under noisy places usually have good hearing.
    B．Many teenagers in the US was said to have bad hearing because they enjoy listening to pop music.
    C．A few people living near airports become deaf.
    D．Noise coming from jet planes or machines won’t do much harm to people.

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    Hacking our senses to boost learning power
    Some schools are pumping music, noises and pleasant smells into the classroom to see if it improves exam results. Could it work? Why do songs stick in our heads? What does your school smell like? Is it noisy or peaceful?
    It might not seem important, but a growing body of research suggests that smells and sounds can have an impact on learning, performance and creativity. Indeed, some head teachers have recently taken to broadcasting noises and pumping smells into their schools to see whether it can boost grades. Is there anything in it? And if so, what are the implications for the way we work and study?
    There is certainly some well-established research to suggest that some noises can have a harmful effect on learning. Numerous studies over the past 15 years have found that children attending schools under the flight paths of large airports fall behind in their exam results. Bridget Shield, a professor of acoustics (声学) at London South Bank University, and Julie Dockrell, from the Institute of Education, have been conducting studies on the effects of all sorts of noises, such as traffic and sirens (汽笛), as well as noise generated by the children themselves. When they recreated those particular sounds in an experimental setting while children completed various learning tasks, they found a significant negative effect on exam scores. “Everything points to a bad impact of the noise on children’s performance, in numeracy, in literacy, and in spelling,” says Shield. The noise seemed to have an especially harmful effect on children with special needs.
    Whether background sounds are beneficial or not seems to depend on what kind of noise it is — and the volume. In a series of studies published last year, Ravi Mehta from the College of Business at Illinois and his colleagues tested people’s creativity while exposed to a soundtrack made up of background noises — such as coffee-shop chatter and construction-site drilling — at different volumes. They found that people were more creative when the background noises were played at a medium level than when volume was low. Loud background noise, however, damaged their creativity.
    Many teachers all over the world already play music to students in class. Many are inspired by the belief that hearing music can boost IQ in later tasks, the so-called Mozart effect. While the evidence actually suggests it’s hard to say classical music boosts brainpower, researchers do think pleasant sounds before a task can sometimes lift your mood and help you perform well, says Perham, who has done his own studies on the phenomenon. The key appears to be that you enjoy what you’re hearing. “If you like the music or you like the sound — even listening to a Stephen King novel — then you do better. It doesn’t matter about the music,” he says.
    So, it seems that schools that choose to prevent disturbing noises and create positive soundscapes could enhance the learning of their students, so long as they make careful choices. Yet this isn’t the only sense being used to affect learning. Special educational needs students at Sydenham high school in London are being encouraged to revise different subjects in the presence of different smells — grapefruit scents for maths, lavender for French and spearmint for history.
    小题1:The four questions in the first paragraph are meant to ________.
    A．create some sense of humour to please the readers
    B．provide the most frequently asked questions in schools nowadays
    C．hold the readers’ attention and arouse their curiosity to go on reading
    D．declare the purpose of the article: to try to offer key to those questions
    小题2:What does the conclusion of the studies of noise conducted by Bridget Shield and Julie Dockrell suggest?
    A．Peaceful music plays an active role in students’ learning.
    B．Not all noises have a negative impact on children’s performance.
    C．We should create for school children a more peaceful environment.
    D．Children with special needs might be exposed to some particular sounds.
    小题3:Ravi Mehta’s experiment indicates that ________.
    A．students’ creativity improves in a quiet environment
    B．we may play some Mozart music while students are learning
    C．a proper volume of background noises does improve creativity
    D．noise of coffee-shop chatter is better than that of construction-site drilling
    小题4:Towards the positive impact of appropriate background sound and smell on students’ learning and creativity, the author’s attitude is ________.
    A．ambiguousB．doubtfulC．negativeD．supportive
    小题5:Which of the following is most likely to follow up the research findings?
    A．Experts’ research into other senses that can improve students’ grades.
    B．More successful examples of boosting learning power by using music.
    C．Suggestions for pumping lots of pleasant smells into school campuses.
    D．Debates on whether noises can really have positive effect on students’ performance.

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：完形填空

    阅读下面短文，从短文后所给各题的四个选项（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。
    Brother Michael and Chris were born in the early 1960s and grew up in a black neighborhood in Richmond, California. Both boys were       in the primary school and brought home mostly A’s on their report cards.
    But in a black family with eight children, money was always      , so the two growing boys often went      . They turned to stealing. They stole cookies from the grocery store and bread from the      . They even stole money from their parents to feed.
    At the end of his first year in high school, Chris received three A’s and       F’s on his report card --- the first time he had       anything in school. Because Kennedy High School only allowed three failures       four years, one more F and Chris would be kicked out of school. That’s when he made up his mind to      .
    Chris made every effort to become       in school. After Chris graduated from college, he worked as a prosecutor(检察官),       criminals, drug dealers, and gang members. Today Chris is famous as one of the       prosecutors in the trial of the century, the O.J. Simpson trial!
    That decision to change took him in an entirely       direction from his brother Michael, who       changing his bad behavior. After high school, Michael continued his anti-social      ---fighting in the streets, taking       and stealing. At the age of 42, Michael Darden died from AIDS.
    This story       us that what we become is determined by the       we make. We can choose to get       or we can choose to get worse. Chris changed. He changed from being a criminal to prosecuting criminals. His brother Michael, on the other hand, was changed. He was changed by       drugs…and finally, he was changed by a deadly disease. Chris made the right choices. He made the changes in his life that helped him       his great dreams.
    小题1:
    A．well- behavedB．well-dressedC．well-knownD．well- informed
    小题2:
    A．plentifulB．looseC．commonD．tight
    小题3:
    A．madB．wrongC．hungryD．bad
    小题4:
    A．chemist’sB．baker’s C．doctor’sD．barber’s
    小题5:
    A．twoB．threeC．fourD．five
    小题6:
    A．obtainedB．failed C．passedD．missed
    小题7:
    A．beyondB．byC．overD．above
    小题8:
    A．stealB．respondC．standD．change
    小题9:
    A．outstandingB．friendlyC．powerfulD．outgoing
    小题10:
    A．treatingB．savingC．questioningD．punishing
    小题11:
    A．leading B．workingC．actingD．performing
    小题12:
    A．similarB．differentC．newD．strange
    小题13:
    A．preferredB．resisted C．admittedD．appreciated
    小题14:
    A．habitsB．signsC．behaviors D．manners
    小题15:
    A．drugsB．actionsC．busesD．pills
    小题16:
    A．persuadesB．warnsC．convinces D．wishes
    小题17:
    A．choices B．friendsC．promisesD．efforts
    小题18:
    A．tallerB．cleanerC．happierD．better
    小题19:
    A．illegal B．usefulC．harmlessD．lawful
    小题20:
    A．destroyB．formC．accomplishD．approach

    查看答案和解析>>

    同步练习册答案