Can exercise during childhood protect you against memory loss many decades later?Exercise early in life seems to have lifelong benefits for the brain,in rats at least.
“This is an animal study,but it shows that physical activity at a young age is very important—not just for physical development,but for the whole lifelong track of cognitive（认知的）development during ageing,”says Martin Wojtowicz of the University of Toronto,Canada.“In humans,it may delay the appearance of Alzheimer's symptoms（阿茨海默氏症）,possibly to the point of preventing them.”
Wojtowicz’s team divided 80 young male rats into two equal groups,and placed running wheels in the cages of one group for a period of six weeks.Around four months later—when the rats had reached middle age—the team taught all the rats to connect an electric shock with being in a specific.When placed in the box,they froze with fear.
Two weeks later,the team tested the rats in three situations: exactly the same box in the same room,the same box with the room arranged differently,and a completely different box in a different room.
The rats without access to a running wheel when they were young now froze the same percentage of times in each of these situations,suggesting they couldn't remember which one was dangerous.But those that had been able to run in their youth froze 40 to 50 percent less in both changed box settings.
"The results suggest the amount of physical activity when we're young,at least for rats,has influence on brain and cognitive health—in the form of better memories—when we're older,"says Arthur Kramer of Northeastern University in Boston,who has found that,in humans,exercise promotes the growth of new brain cells.
1.The study shows that_____.
A. physical activity is important for physical health
B. using the running wheels is of benefit to the rats’ growth
C. physical activity can prevent human’s Alzheimer's symptoms
D. the more exercise a rat has when young,the better memory it will possess when older
2.How are Paragraph 3 and 4 mainly developed?
A. By analyzing causes. B. By giving an example.
C. By describing the process. D. By showing differences.
3.What does the underlined word "it" in Paragraph 2 refer to?
A. Exercise. B. Development.
C. Benefit. D. Study.
4.What is the author's attitude towards the animal study?
A. Negative. B. Objective.
C. Critical. D. Doubtful.
难度: 中等查看答案及解析
Feifei,an 11-year-old boy from Xuzhou,Jiangsu Province,suffered from a sudden acute eye disease which has almost led to blindness.The disease was caused by excessive（过度的）eye fatigue（疲劳）during the winter vacation, during which he played computer games for continuous 10 days and nights.
Many youngsters in China nowadays are increasingly addicted to computer games and other electronic products. This is followed by a series of health problems,with the most typical case being myopia,or nearsightedness.
According to the latest research report released by the World Health Organization (WHO),the myopia rate among Chinese teenagers ranks first in the world—70 percent of high school and college students.The rate is nearly 40 percent in primary school students,while it is only 10 percent for their peers in the United States.
There are at least 10 million people in China with severe myopia,and they are likely to get pathological（病理性的）myopia in middle age.Pathological myopia can't be treated with glasses or surgery,and it is one of the biggest factors that lead to blindness,Xu Xun,director of the ophthalmology（眼科学）department at Shanghai General Hospital,pointed out.
Experts explain that two major factors lead to the high rate of myopia among Chinese people.One is high academic pressure,and the other one is excessive use of electronic devices over a long period of time.Genetics,on the other hand,are not the main reason,as only 20 percent of Chinese people had myopia in the 1960s.
"Teenagers are now faced with severe academic pressure,which means they often study without natural light. This increases their risk of becoming nearsighted,"Xu said.
Experts suggest that youngsters maintain a proper balance between study and rest so as to protect their eyesight, and parents should play an active role in the process.
1.Why does the author mention Feifei's experience in the first paragraph?
A. To advise people to protect their eyes.
B. To introduce the topic of nearsightedness.
C. To inform people of the cause of blindness.
D. To show that Feifei developed an eye disease.
2.What can be learnt from the passage?
A. Nearsightedness may cause other health problems.
B. There are more nearsighted students in the United States.
C. 70 percent Chinese students in primary school are nearsighted.
D. Pathological myopia is most likely to cause blindness.
3.Which of the following can be a main reason for myopia?
A. Genetics factors.
B. Low academic pressure.
C. Overuse of electronic devices.
D. Reading in natural light.
4.What will be probably discussed in the following paragraph?
A. The significance of protecting eyesight.
B. Youngsters’ bad behavior leading to myopia.
C. The relationship between youngsters and their parents.
D. Parents’ role in helping youngsters protect thew eyesight.
难度: 中等查看答案及解析
With the Chinese language growing in popularity,the UK government plans to invest（投资）10 million pounds to help more kids learn Mandarin（普通话）.Do you think it is necessary for the UK pupils to learn Mandarin?Some people share their opinions online.
Ted(UK): The learning of any language can be valuable and rewarding,but it is not suitable for everyone. Chinese is a difficult language to learn and the UK has a poor reputation for teaching foreign languages.Why should they learn Chinese when most people in the world speak English?
Mark(US): I studied French for 2 years in high school and German for 4 years in college.I studied Mandarin informally for about 4 months before moving to China.Now I speak Mandarin every day as my wife doesn't speak English.But it is far from being fluent.Learning additional languages is a great thing,which offers a different perspective on the world around us.Nowadays,it's almost necessary to be able to speak more than just your native tongue.
George(UK): No,unless they're taught from a very early stage of childhood.Mandarin is so difficult.If China really is going to dominate the world,it'll have to do so by speaking the world’s dominant language—English.
Sam(UK): I don't think Chinese will become as widely spoken throughout the world as English.It is too difficult to learn as a second language.To learn Chinese you completely have to devote yourself to learning how to write and read it.If you have to learn it besides other subjects you can’t be good at it.But Chinese will become more popular, and that is a good thing.
1.What is probably Mark's main motivation for learning Chinese?
A. Further education. B. Effective communication.
C. His frequent travel. D. The official policy.
2.What does Sam think of learning Chinese?
A. It's necessary. B. It's of little use.
C. It takes too much time. D. It's not popular.
3.What seems to be the major problem when foreigners try to learn Chinese?
A. Its difficulty as H language. B. Misunderstanding about China.
C. The great popularity of English. D. A lack of learning resources.
难度: 中等查看答案及解析
If you make a list of the world's top ten most challenging jobs,chances are that being a teacher will not make the cut.But think about the discouraging task millions of educators face each day as they try to shape a group of often bad-tempered,wild kids into intelligent,well-rounder individuals.That surely has to be the toughest job in the world, especially given that there is no promotion or bonus awaiting them even if they are wildly successful!
What if there all-important individuals that we often take for granted（想当然）disappear from our lives?That was what Project Ed and Participant Media's Teach campaign asked filmmakers of all ages to imagine in their recently-held competition.Entitled "A World Without Teachers",its purpose was to inspire more young people to become teachers.However,the 62 amazing video submissions also serve as a reminder of how horrible things would be if we didn't have these selfless individuals guiding us through life.What was interesting is that even the youngest participants did not appear to be happy at the idea of not having anybody telling them what to do.
High-school student Savannah Wakefield reflected if art as we know it today would have been different without teachers.Would Monet have discovered his talent for impressionism?Los Angeles-based Miles Horst,who won the 1000 USD prize for the best adult submission imagines a world where teachers are replaced by a “brain box” in his fun lively entry.
Youth category winner Marina Barham's video represents a fact we all know but often forget.Teachers don't just teach,they inspire something that no electronic device,no matter how smart,can do!So the next time you think your teacher is being "mean" for trying to channel you in the right direction,imagine a life without him/her.We have a feeling it will not appear as rosy!
1.What is the text mainly about?
A. The significance cf teachers.
B. The campaign to promote teachers' status.
C. A survey of people's views about teachers.
D. A competition to win the prize for the best teacher.
2.From the passage we can learn that_____.
A. teaching naughty kids is a very discouraging task
B. being a teacher is one of the most challenging jobs in the world
C. a successful teacher has the greatest chance to be promoted
D. teachers have little influence on kids' individual development
3.What is the purpose of the project “A World Without Teachers”?
A. To attract kids to submit more videos of their teachers.
B. To encourage more people to go into teaching career.
C. To expect teachers to devote themselves to their jobs.
D. To remind students to appreciate teachers' hard work
4.What does the underlined sentence in Paragraph 4 suggest?
A. Teaching is quite different from other jobs.
B. The future of teachers' work appears inspiring.
C. A world without teachers will be unimaginable.
D. Many people attach more importance to teaching.
难度: 中等查看答案及解析
______in painting,John didn't notice evening approaching.
A. To absorb B. To be absorbed
C. Absorbed D. Absorbing.
难度: 中等查看答案及解析
The teacher stressed again that the students should not______any important details while retelling the story.
A. bring out B. let out
C. leave out D. make out
难度: 中等查看答案及解析
—I hear that you will be on travel again.
—Yeah.My boss______for me to discuss details with someone from another company.
A. asked B. arranged
C. sent D. called
难度: 中等查看答案及解析
If what you say is not______with what you do,it will have a bad effect on your children.
A. controversial B. consistent
C. confident D. considerate
难度: 中等查看答案及解析
The couple watched the Kongming light go higher and higher until they lost______of it.
A. view B. scene
C. vision D. sight
难度: 中等查看答案及解析
More and more high-rise buildings have been built in big cities______space.
A. in search of B. in place of
C. for lack of D. for fear of
难度: 简单查看答案及解析
When I saw the cars crash on the road,a frightened feeling______through my mind.
A. flashed B. struck
C. hit D. occurred
难度: 中等查看答案及解析
When it was his turn to deliver his speech,______he walked towards the microphone.
A. nervously and embarrassingly B. nervous and embarrassedly
C. nervously and embarrassing D. nervous and embarrassed
难度: 简单查看答案及解析
It was the boy,rather than his teachers,that______for what the boy had done.
A. were to blame B. were to blamed
C. was to blame D. was to be blamed
难度: 中等查看答案及解析
The sale usually takes place outside the house,with the audience______on benches,chairs or boxes.
A. having seated B. seating
C. seated D. being seated
难度: 中等查看答案及解析
Before the summer of 2016,I had always been afraid of heights.For most of my life,even idea of climbing a mountain would give me butterflies in my stomach.1.
On my birthday that year,when my mother and I first made the decision to climb Mt.Ranier in August,my knees actually shook with anxiety.However,it was finally time for our first outdoor climbing practice and the butterflies in my stomach had certainly multiplied. 2.Try to enjoy the feeling and turn the anxiety into hope.”She was always full of kind words,but could I apply her wisdom in time for the day of our final climb?
3.Though it was August,the skies were gray on the southernmost face of the mountain.Near the halfway point,I lost my footing and fell backwards down the trail,slightly twisting my ankle.Though I was sore,I kept going for another mile or so,but I had to give up before we reached our intended target.
4.However,I was able to recover in time for our planned summit climb.I had,over I gained the physical and emotional strength to recover quickly and come through adversity (even stronger.The breathtaking views along our climb no longer distracted me with fear but forced me to follow through with my goal.Unluckily,I had not overcome my fear of heights.5.
A.Don't let the butterflies get the best of you.
B.Eventually,I was not afraid of heights at all.
C.As it turned out,our practice hike proved challenging.
D.I didn't succeed on our first practice and suffered slight injury.
E.The breathtaking views made me relaxed and I went smoothly throughout the hike.
F.It was in that summer that I turned 16 and achieved something that deeply influenced my life.
G.However,I had made peace with it to the point where I could remain inspired by my own achievements.
难度: 中等查看答案及解析
John Clark was a postman. He was fond of dogs. However, when he was delivering（投递）letters, he found that _______dogs were his friends. One particular dog called_______, who lived at No.108 Turner Road, was one of John's _______. Whenever John came near his _______house, Spot would lie in and _______out on John, barking（吠叫）and trying to _______his ankles.
After a heavy snow, _______was freezing that morning. The road was covered with_______. John was afraid of _______ down, so he________his bike and walked with________steps. Unfortunately, John slipped on a patch of ice, which was opposite to No.108 Turner Road. Spot________this as John together with his bike made such a big noise.Spot jumped onto John’s ________and tried to bite his neck.Quick as a flash, John, ________hands were full of letters, bit________on the leg.
John Clark said later, it was the ________thing I could do.I don't approve of（赞成）________to animals, but that dog________ had it coming. Since that day I’ve had no ________at No.108.Spot always hides round the ________of the house when he hears me coming.
1.A. all B. not all C. one of D. none of
2.A. Spot B. John C. Turner D. Clark
3.A. friends B. neighbors C. enemies D. companions
4.A. own B. owner's C. friend's D. lovely
5.A. reached B. set C. worked D. jumped
6.A. lap B. kill C. kiss D. bite
7.A. John B. It C. Spot D. the street
8.A. dirt B. mud C. ice D. water
9.A. falling B. knocking C. turning D. going
10.A. rode B. left C. pushed D. pulled
11.A. safe B. big C. quick D. slow
12.A. smelled B. saw C. recognized D. heard
13.A. chest B. shoulders C. legs D. feet
14.A. both B. whose C. his D. which
15.A. John B. himself C. Spot D. itself
16.A. best B. lonely C. only D. very
17.A. mercy B. love C. pity D. cruelty
18.A. probably B. perhaps C. hardly D. really
19.A. letters B. trouble C. choice D. friends
20.A. front B. back C. door D. roof
难度: 中等查看答案及解析
1.Don't have your skin e_______to the strong sunlight.
2.There is no______（可能性)that he will accomplish that work on his own.
3.With Wang Ping g______the way,we soon got to our destination.
4.Teaching young children is a______（挑战性的）job.
5.The scientists are doing s______research on the rats.
6.According to his______（描述）,the scenery of the mountain is beautiful.
7.These meals can be prepared in advance,and served at your c______.
8.There are many tourist______（景点）in XingTai.
9.The team e______of six boys and three girls succeeded in passing the Volley.
10.Although she didn’t know much about painting,she was rather______（热心的）.
难度: 中等查看答案及解析
文中共有10处错误，每句中最多有两处。每处错误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（∧），并在此符号下面写出该加的词。
删除：把多余的词用斜线（＼）划掉。
修改：在错的词下划一横线，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。
1.Every time I will meet with difficulties in study,I solve it by myself.2.It doesn’t make sense to complain after defeated.3.Though he was a enthusiastic football player,but recently he seems to have become uninterested.4.People from America and Britain have no difficulties in understanding each other.5.According to a new report,British scientists have found out a cure of this disease.6.The law is intending to protect women from been abused.7.What is often the casein life,there is no simply answer.
难度: 中等查看答案及解析
假定你是李华，你的英国朋友Chris将于10月来中国旅游，请你用英语给他写封信。内容包括：
1.写信的目的；
2.来中国前做些准备，如看一些有关中国文化的书，学会使用筷子……
注意：
1.词数100左右；
2.可以适当增加细节，以使行文连贯
3.需有恰当结尾。
Dear Chris,
How is everything with you?
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
_____________________________________________________________
Yours,
Li Hua
难度: 中等查看答案及解析