高考英语一轮复习Unit1Greatscientists随堂练习新人教版必修
Unit 1 Great scientists
Ⅰ.单词拼写
1．If you foresee (预测；预见)something，you expect and believe that it will happen.
2．Many cancer victims can be cured(治愈)if the disease is found early enough.
3．If we can defeat (打败)that team，we'll be through to the final.
4．At the end of their meeting，it was announced (宣布) that an agreement had been reached.
5．If you can't handle (处理)the job，I will get someone else to do it.
6．Keller is cautious (谨慎的)about making predictions for the success of the program.
7．The rural environment has a(n) positive (积极的) effect on the children's health.
8．Exposed (暴露)to so many advertisements，we can't help being persuaded to buy something we don't really need
Ⅱ.单句改错
1．The assistant was absorbing in his reading.absorbing→absorbed
2．He exposed the plan in several newspapers.in→to
3．Parents blame them for drop the towel in the bathroom.drop→dropping
4．Parents should attend their children and lend an ear to what they have to say.attend后加to
5．It makes a sense to work on the problem before it gets out of control.去掉a
6．I have pains in my back at every time I catch a cold.去掉 at
7．Only we are united can we solve the problems.only后加if/when
8．His skin is exposing to the sun.exposing→exposed
Ⅲ.教材与语法填空
John Snow，a well－known doctor in London，became 1.inspired(inspire)when he thought about helping ordinary people who 2.were exposed(expose)to cholera，a 3.deadly(dead)disease of his day.Thousands of people died every time there was an outbreak 4.because no one knew the cause of it.John wanted to help solve 5.the problem.
He got interested in two theories 6.explaining(explain)how cholera killed
people.He believed in the second theory that suggested that people 7.absorbed (absorb) the disease with their meals.In 1854,8.when another outbreak hit London ，he was ready to test the two theories.9.With the help of the map he made ，he got a valuable clue about the cause of the disease and was able to announce that the water was 10.to blame (blame)．
Ⅳ.教材与短文改错
There was time when the powerful Christian Church believed God had made the world.It was because that reason that the earth was thought to be the centre of the solar system.Copernicus had thought long and hardly about it and tried to find an answer.But ，all his mathematical calculations led to the same conclusion what the earth was not the centre of the solar system.When he placed a fixed sun at the center of the solar system ，the movement of the other planets made the sense.The Christian Church rejects his theory.But her theory is now the basis on that all our ideas of the universe are built.
答案：
There was ∧a
time when the powerful Christian Church believed God had made the
world.It was because ∧of
that reason that the earth was thought to be the centre of
the solar system.Copernicus had thought long and hardly hard
about it and tried to find
an answer.But However
，all his mathematical calculations led to the same conclusion what that
the earth was not the centre of the solar system.When he placed a fixed sun at the center of the solar system ，the movement movements of the other planets made the
sense.The Christian Church rejects rejected his theory.But her his
theory is now the basis on that which
all our ideas of the universe are built.
Ⅴ.话题微写作
1．在历史的长河中，科学家为这个世界做出了巨大的贡献。
2．我认为，科学家就是那些在工作中严格要求自己及专注于他们所从事的每件事的人。
3．科学家都牢记这么一点：一个理论如果无法帮助世人从不可预料的困境中解脱的话，就不能称之为好理论。
4．科学家们耗尽一生的心血，只为找到一个这样的理论。
Throughout history ，scientists have made great contributions to the world.In
my opinion，scientists are those who are strict in their work and are always absorbed in everything they do.Scientists keep it in mind that a theory makes no sense if it can't help the world that is exposed to unexpected dangers.Scientists devote all their life to their research so that they can find such a theory.。
2019版高考英语一轮练习Unit1GreatScientists(含解析)新人教版必修5
Great Scientists李仕才一、阅读理解。
They say if you love your job, you’ll never work a day in your life. We say if youtravel for work, you’ll never have a boring commute( 上下班来回) a day in your life.If the typical9-to- 5 isn ’t working for you, here are some option s that will pay you to travel. No matter your current skill set, you can probably do it somewhere else.Represent abroadThe State Department is actively hiring Foreign Service Officers, and it’s probably easier than you think to become one. You’ll hav e to a lot of tests, but ifyou pass, you’ll spend the next years of your life working around the world. A Junior Foreign Service Officer starts at $71,000 a year.Teaching English as a Second Language abroad is one of the best ways to deepenunderstan ding of another culture.There’s no need to be a certified in order to go abroad. In this program in China, soon-to-be teachers their Teaching English as a Foreign Language(TEFL) certifications.in China will earn $2,500 for working six months, plus room and board.A cruise ship is a floating village. Therefore, any job that you could have inEnglish teacher go abroad to obtain A beginning teachera village you could have onboard a ship-even auctioneering(做拍卖师). Carnival is hiring an art auctioneer to work aboard a luxury cruise ship. The only qualifications necessary are a college degree and public speaking skills. Going going sold.Write the railsWriters can reimagine themselves as rail-surfing Jack Kerouacs, crossing thecountry and writing from coast to coast on the Amtrak Writer’s Residency. The application process consists of two questions, as well as the opportunity to provide up to a 20-page writing sample. Amtrak will select 24 writers to participate in theprogram with the help from a panel of judges. Although the project won’t replace afull-time job, it ’s really a fun opportunity. The application period for 2016 hasclosed, but applications will reopen in the fall.1. Which job requires a college degree?A. Representing abroadB. Teaching English in ChinaC. Selling art on the seasD. Writing the rails2. The advertisement is intended for.A. those who are tired of their present jobsB. those who want to have a job with travelingC. those who just graduate from universityD. those who want to go on vacation abroad3. What may Jack Kerouacs be?A. Director of the Amtrak WriterB. A sportsman devoted to rail-surfingC. An applicant of the programD. A famous writer’s Residency【语篇解读】这则广告是为那些想要在旅游中工作的人，介绍了一些职位。
高考英语一轮复习 Unit 1 Great scientists高效演练跟踪检测 新人教版必修5
Unit 1 Great scientistsⅠ单句语法填空1．Children, when (expose) to an Englishspeaking atmosphere, will pick upthe language much more easily.答案：exposed2．When he came back three hours later, they were still sitting on the sofa, (absorb) in conversation.答案：absorbed3．Neither I nor Jane and Mary (be) happy about having one examination after another. We really don’t want to go to school.答案：are4．Always read the (instruct) on the bottle carefully and take the right amountof medicine.答案：instructions5．(2016·四川卷)We’re not saying that everyone needs to contribute their livesthe poor.答案：to6．I drew a (conclude) from my own experiences that where there is a will thereis a way.答案：conclusion7．The police had figured out the cause of the traffic accident and it was the driverof lorry that should be (blame) for it.答案：to blame8．The underground is under (construct) here at present and will be completednext year.答案：construction9．(全国卷Ⅱ)It may not be a great suggestion. But before a better one is put ，we’ll make do with it.答案：forward10．As nobody here knows what is wrong with the machine, we must send for an engineer (handle) the problem.答案：to handleⅡ单句改错1．It doesn’t make a sense for parents to give children whatever they want. 答案：去掉a2．They are going to have some trees plant this weekend.答案：plant→planted3．Only if you return them on time I lend you some books.答案：在I 前加will4．He was struck by the beauty for the first time he visited Guilin.答案：去掉for5．The teacher cured him for his bad habits and he made great progress in English. 答案：for→ofⅢ单元语法——过去分词作定语和表语1．(2018·河北邯郸一模)Even today the books (print) at the time are valuableand treasured by libraries and book collectors.答案：printed2．(2018·宁夏银川一中一模)Classical Chinese poetry is traditional Chinese poetry (write) in classical Chinese and typified by certain traditional forms.答案：written3．The workers (expose) to the radiation are likely to develop diseases.答案：exposed4．The player got (injure) in the last match, so he couldn’t compete in thefinal.答案：injured5．He looked (worry) after reading the letter because his mother was suddenlyill.答案：worriedⅠ教材与语法填空根据教材课文内容，在空白处填入1个适当的单词或括号内单词的正确形式。
高三英语一轮复习基础必备Unit1Greatscientists课时作业新人教版必修5
——————————教育资源共享步入知识海洋————————Unit 1 Great scientists[基础回顾]Ⅰ.单句语法填空(导学号02516253)1．Always read the instructions (instruct) on the bottle carefully and take the right amount of medicine.2．In conclusion (conclude), I would like to say how much I have enjoyed myself today.3．Mark is a cautious(caution) shopper who always does some careful research on the market before he buys something valuable.4．When he came back three hours later，they were still sitting on the sofa，absorbed (absorb) in conversation.5．It is so challenging (challenge) a job that I can't finish it on my own.6．Children，when exposed(expose) to an Englishspeaking atmosphere, will pick up the language much more easily.7．He made an apology to me for his not attending (attend) the concert on time.8．It may not be a great suggestion.But before a better one is put forward，we'll make do with it.9．Whenever he didn't perform well in his studies, he would blame his failure on carelessness.10．Although her relatives didn't think she could live for three months，the old doctor finally cured her of her disease.Ⅱ.单句改错(每句一错)(导学号02516254)1．It makes a sense to work on the problem before it gets out of control.去掉a2．Neither the teacher nor the students is content with the result. is→are 3．He was struck by the beauty for the first time he visited Guilin.去掉for4．Although defeating in the match, we didn't lose heart. defeating→defeated 5．When I opened the door, I found my father sitting in his chair, completely absorbing in the newspaper. absorbing→absorbedⅢ.佳句写作(导学号02516255)1．在读了Lucy 的信后，我得出结论：她是诚实的。
高考英语一轮复习 Unit 1 Great scientists考点规范练 新人教版必修5
Unit 1 Great scientistsⅠ.阅读理解“She was lost in her book.”“He couldn’t put the book down.”“I was on the edge of my seat.”These are all common phrases that we may use to describe the experience we have when we read books.In the middle of a good book,we may feel as though we have left the real world behind.So how do our minds use the letters on the page to let us step into the shoes of our favorite characters and experience the events in a story?R ecent studies show that the reason is because our minds really do pretend that we are actually participating in the story.Just like a flight simulator(模拟器) allows training pilots to practice flying a plane,stories seem to be a life simulator,allowing our minds to pretend they are doing all sorts of interesting activities.Let us take a look at some of these studies.In one set of studies,scientists presented the participants in their study with sentences like “The man saw the bird in the sky”and “The man saw the bird in the nest.”Participants in the study would read t he sentences on a computer screen,and would then see an image on the screen that either matched or did not match the sentences.People would click a button faster when the sentence and image matched than when they did not match.Notice that there is nothing in the sentence that tells the participants in the study how the bird should look—both sentences simply say,“the bird”.So,when people are faster to respond to the matching image,we can conclude it is because of perceptual(感觉的) simulation.In new research,scientists are also beginning to find that difficulty creating these mental simulations is related to difficulty understanding and following stories that are longer and more detailed.So,for some children,not being able to see the stories in their minds may make it harder for them to keep track of everything thatis going on and where,when and why it is going on.This means that this research is important,not only because it tells us something interesting about how our minds work but also because the findings could someday help teachers and parents find new waysto help children who are having difficulty with reading.1.According to Paragraph 1,readers are likely to .A.get lost in a bookB.forget what they have readC.have difficulty keeping readingD.get different feelings from the same book2.A flight simulator is mentioned to .A.show the advantages of readingB.explain how to read more efficientlyC.show the differences between reading and flyingD.explain what happens in our minds while reading3.What can we infer from the studies mentioned in Paragraph 3?A.Readers are good at matching.B.Readers prefer images to words.C.Readers are usually very imaginative.D.Readers create mental images while reading.4.The research findings mentioned in the text may help .A.people read carefully for detailsB.people read short articles quicklyC.those who find it difficult to readD.those who show no interest in readingⅡ.完形填空(2016·郑州第二次质量预测)I had just started my sec ond year studying at Cambridge University when I was faced with the news I had never expected.A lump in my neck 1 out to be cancer.I would 2 six months of chemotherapy(化疗).After the shock,I was struck by this thought:my 3 didn’t have any room for cancer.I had so much I wanted to 4 and so many goals I wanted to chase.I was faced with the 5 job of telling my friends and family.Then,I had to decide whether to 6 in Cambridge and take five exams at the end of the year.My doctor 7 against it,and so did my parents and teachers.My doctors and teachers convinced me that taking some time off to 8 and relax would be the best thing for me.I could not think of anything 9 .I did not want to 10 a year of my life,receiving pity from those around me.Together with my parents,I tried to persuade the university to 11 me to stay at Cambridge and study only half the course.At the end of the year I would take two exams.It was really a 12 to persuade them to agree.Treatment began and I was up and down from Cambridge to London every other week.It made me feel 13 ,but to a much lesser degree than I had expected.I was14 to read,eat and socialize exactly as I used to.I slept a lot and rested alot,but I also worked hard at my studies.It gave me focus,and it also gave me pleting my 15 at the end of the term felt like a great personal victory.I took a 16 to continue studying while undergoing treatment,and it 17 .I was successful in my exams—and more 18 ,I made a full recovery.Every person facing a disease like cancer must make the 19 that are right for them.I am 20 that I made the decision that was right for me.1.A.stuck B.cameC.turnedD.worked2.A.require B.expectC.senseD.arrang e3.A.body B.memoriesC.familyD.dreams4.A.face B.achieveC.showD.understand5.A.necessary B.temporaryC.difficultD.disappointing6.A.join B.treatC.settleD.continue7.A.fought B.advisedC.actedD.decided8.A.recover B.exerciseC.studyD.play9.A.better B.worseC.moreD.less10.A.save B.spendC.takeD.miss11.A.help B.remindC.allowD.invite12.A.struggle B.failureC.burdenD.trouble13.A.tired B.relaxedC.confidentD.nervous14.A.afraid B.readyC.ableD.eager15.A.purpose B.projectsC.treatmentD.exams16.A.rest B.riskC.privilegeD.job17.A.ended up B.passed onC.paid offD.broke out18.A.clearly B.interestinglyC.specificallyD.importantly19.A.choices B.changesC.effortsD.chances20.A.surprised B.excitedC.determinedD.proudⅢ.语法填空(2016·长沙一模)Researchers find that 1. large amount of African dust can blow all the way across the Atlantic Ocean and fall on North and South Am ericas.African dust storms can harm air quality 2. the ocean.But new research by scientists from some countries 3.(show)the storms also can do some good.4. is fo und that an average of 28 million metric tons of Saharan dust falls in South America’s Amazon River basin each year.Scientists say the dust is an important 5.(provide) of fertilizer.“Yes,it’s 6. (surprise) because of the huge amount of dust and phosphorus(磷),7. is a nutrient that plants need 8.(grow),” one of them says.In fact,the phosphorus 9.(fall) from the sky is about the same as the amount that rivers carry out each year.The thick rainforest and the desert dust 10. (join) together on one small planet.〚导学号92550059〛Ⅳ.短文改错(2016·太原一模)Yesterday my friend Julia and me had lunch in the Pizza Hut behind our school.I knew Julia wasn’t crazy about pizzas,but she came along just because me.At the table next to ours,there were two guys from our class.One of them was real funny.He triedto imitate all the customer in the Pizza Hut.We couldn’t stop to laughing.And there were some people whom did not like the fact that two boys were imitating them.They complained to an owner of the Pizza Hut,so he came over and tell them to stop.Seeing it,Julia and I was greatly embarrassed.##考点规范练21(必修5Unit1)Ⅰ.【解题导语】本文是说明文。
高考英语一轮复习 Unit1 Great scientists基础梳理训练 新人教版必修5
Unit 1Great scientists1．____________ adj. 科学的→____________ n．科学→____________ n．科学家2．____________n．特征；特性→____________adj.特有的；独特____________n．特性；性格；人物；文字3．____________ vt. & vi.结束；诊断出；议定→__________ n．结束；结尾；结论4．____________ vt.打败；战胜；使受挫→____________ n．失败5．____________ vt.(与to连用)暴露；揭露；使曝光→____________ adj.无遮蔽的；不遮挡风雨的→____________ n．显露；暴露；揭露；曝光6．____________ n．治愈；痊愈→____________ vt.治愈；治疗7．____________ vt.分析→____________ n．分析8．____________vt.吸收；吸引；使专心→____________adj.精神集中→____________ adj.十分吸引人的9．____________ adj.熟练的；经验或知识丰富的→____________ n．专家；行家10．____________ vt.责备；谴责；把……归咎于→____________ n．过失；责备11．____________ vt.怀疑→____________ n．嫌疑犯12．____________ n．柄；把手→____________ vt.处理；操纵13．____________ adj.严重的；剧烈的；严厉的→____________adv.严重地；严格地；严厉地14．____________ vt.连接；联系→____________ n．联系；连接；环15．____________ vt.宣布；通告→____________ n．宣布；通告16．____________ vt. & vi.捐献；贡献；捐助→____________ n．捐献；贡献；捐助17．____________ vt.预见；预知18．____________ n．泵；抽水机→____________ vt.(用泵)抽(水)19．____________ vt.照顾；护理；出席；参加→____________ n．出席；参加，到场20．____________ vt.污染；弄脏→__________ n．污染→____________ adj.被污染了的21．____________ vt.命令；指示；教导→____________ n．教育；说明；指导；教训→____________ adj.富有教益的；有启发的22．____________ vt.建设；修建；创建→____________ n．建造；建筑物；建立；结构→____________ n．建造者；建造商→____________ adj.建设性的；积极的23．____________ vi. & vt.(使)旋转；纺(线或纱)24．____________ adj.热情的；热心的→____________ n．热情；热心25．____________ adj.小心的；谨慎的→____________ n．小心；谨慎；告诫26．____________ vt.拒绝；不接受；抛弃1．There are many new ____________(科学的) discoveries.2．A dropped cigarette is being ____________(指责) for the fire.3．We must take ____________(积极的) steps to deal with the problem.4．Black walls ____________(吸收) a lot of heat during the day.5．The writer personally ____________(捐助)$5000 to the earthquake fund.6．Those are the facts; what do you ____________(推断出) from them?7．Moving to the country ____________(治愈) her of the illness.8．Sadly，our team was ____________(打败) by theirs by 10 points.9．The news was ____________(宣布) to the public on TV.10．Don't ____________(暴露) your skin to direct sunlight.1．____________ forward提出2．expose ...____________ 使显露；暴露3．apart ____________除……之外；此外4．____________ sense讲得通；有意义5．____________ a conclusion得出结论6．link ...____________ ...将……和……联系或连接起来7．(be) strict ____________ ...对……严格的1．So many thousands of terrified people died ______ ______ there was an outbreak.每次爆发霍乱时，都有大批惊恐的老百姓病死。
2019-2020年高三英语一轮复习 Unit 1 Great Scientists练习 新人教版必
2019-2020年高三英语一轮复习 Unit 1 Great Scientists练习新人教版必修5Ⅰ.语法单句填空1．(xx·四川改编)—I hope to take the puter course.—Good idea.________(find) out more about it, visit this website.答案：To find本题考查非谓语动词。
句意：——我希望能上电脑课。
——好主意。
要想了解更多，浏览这个网站。
动词不定式放于句首，作目的状语，符合语境。
2．________73-year-old woman, who died of respiratory failure on Dec. 6, was confirmed to have been carrying ________H10N8 virus.答案：A; the考查冠词。
句意：12月6日，一位73岁的妇女死于呼吸衰竭，她被确诊携带H10N8病毒。
第一空填不定冠词表泛指；第二空填定冠词表特指。
3．Be careful when you deal with this chemical, as it will explode when ________(expose) to sunlight.答案：exposed考查非谓语动词。
句意：处理该化学物质时一定要小心，因为暴露在阳光下，它会爆炸。
when后省略了句子的主语it(this chemical)和动词be的形式is，所以选D项。
4．Some school teachers plained, “Many kids haven't got any hobbies—________ you call playing puter games a hobby.”答案：unless考查连词。
句意：一些老师抱怨说“许多孩子没有任何爱好，除非你把打电脑游戏叫做一项爱好”。
高三英语一轮复习 unit 1 great scientists精品同步练习 新人教版必修5
Unit 1 Great scientistsⅠ.多项选择1．The more one is__________the English－speaking environment，the better he or she will learn the language.A．exposed to B．filled inC．caught on D．kept up解析：选A。
考查动词短语辨析。
句意：一个人越多地接触说英语的环境就越能学好这门语言。
be exposed to意为“暴露于”。
fill in填充；catch on理解；keep up使不倒下。
2．(2011年江西高安中学模拟)The workers will go on strike if the demands they __________ are turned down.A．put aside B．put throughC．put forward D．put away解析：选C。
考查动词短语辨析。
句意：如果工人们提出的要求被拒绝的话，他们会继续罢工。
put forward提出(主意、计划等)，符合语意。
put aside把……放在一边；put through 接通电话；put away把……收起来，均不符合语意。
3．We were all very much attracted by the beautiful scenery__________we set foot in the village.A．quickly B．suddenlyC．finally D．immediately解析：选D。
考查immediately的用法。
immediately除作副词“马上，立即”讲外，还可作连词，意为“一……就……”，相当于as soon as，引导时间状语从句。
句意：我们一踏进这个村庄，就都被它美丽的景色所吸引。
4．__________cleaning the yard and making up the beds for the old，we also read newspapers for them and had chats with them.A．Except for B．Rather thanC．Apart from D．Instead of解析：选C。
高考英语一轮精选练Unit1GreatScientists(含解析)新人教版必修5
2021年高考英语一轮精选练Unit1GreatScientists（含解析）新人教版必修5李仕才一、阅读明白得（2020·陕西省部分学校第一学期摸底检测）From young kids to fitness lovers，to those looking for a laugh， or to families looking for a free movie night， Atlantic Station prepares some days for them to enjoy this year.Tot Spot—Each Tuesday morning， Atlantic Station’s Central Park transforms into every child’s dream playground！ From 10：00 a.m.to noon， kids can enjoy games，storytelling， toys， music and some very special things. This event begins on April 5 and lasts through September 27.Wellness Wednesday—Each Wednesday from 6：30 p.m.to 7：30 p.m.， Atlantic Station’s Central Park becomes the perfect place to find quietness of the mind and body while instructors lead guests through exercises including yoga and more. Wellness Wednesday welcomes all ages and skill levels. This event begins on April 6 and lasts through September 28.Improv in the Park—Whole World Theatre， Atlanta’s premier improv group， has once again partnered with Atlantic Station to bring a familyfriendly night of comedy to the Central Park on the first Wednesday of each month until September. Bring a blanket， relax under the stars and prepare to laugh until your stomach hurts！ The hourlong show begins at 8：00 p.m. This event occurs on April 5， May 4， June 1，July 6 and August 3.Movies in the Central Park—Each Thursday night at dusk， guests are invited to bring chairs， blankets， togo snacks and picnics to Atlantic Station’s Central Park. All outdoor screenings are available， weather permitting， so keep your fingers crossed for no The Wizard of Oztype storms！ Be sure to arrive early to find a good seat.【解题导语】本文要紧介绍了大西洋站几个能够让人们放松自己、享受生活和获得乐趣的活动。
高考英语一轮复习Unit1GreatScientists精练新人教版必修5201809281101
Unit 1李仕才[基础回顾]Ⅰ.单句语法填空1．Always read the instructions (instruct) on the bottle carefully and take the right amount of medicine.2．In conclusion (conclude), I would like to say how much I have enjoyed myself today.3．Mark is a cautious(caution) shopper who always does some careful research on the market before he buys something valuable.4．When he came back three hours later，they were still sitting on the sofa，absorbed (absorb) in conversation.5．It is so challenging (challenge) a job that I can't finish it on my own.6．Children，when exposed(expose) to an Englishspeaking atmosphere, will pick up the language much more easily.7．He made an apology to me for his not attending (attend) the concert on time.8．It may not be a great suggestion.But before a better one is put forward，we'll make do with it.9．Whenever he didn't perform well in his studies, he would blame his failure on carelessness.10．Although her relatives didn't think she could live for three months，the old doctor finally cured her of her disease.Ⅱ.单句改错(每句一错)1．It makes a sense to work on the problem before it gets out of control.去掉a2．Neither the teacher nor the students is content with the result. is→are 3．He was struck by the beauty for the first time he visited Guilin.去掉for4．Although defeating in the match, we didn't lose heart. defeating→defeated 5．When I opened the door, I found my father sitting in his chair, completely absorbing in the newspaper. absorbing→absorbedⅢ.佳句写作1．在读了Lucy 的信后，我得出结论：她是诚实的。
高考英语一轮复习1Unit1Greatscientists知能演练轻松闯关新人教版必修
Unit 1 Great scientistsⅠ阅读理解A(2019·烟台诊断)Grandparents who help out occasionally withchildcare in their community tend to live longer than seniorswho do not care for other people, according to a study from Berlin,Germany.“Having no contact with grandchildren at all can negativelyimpact grandparents’ health. This link could be deeply rooted in our evolutionary past when help with childcare was important for the survival of the human species，”said Sonja Hilbrand, one of the researchers.The findings are drawn from data on more than 500 people over age 70. Overall, after accounting for grandparents’ age and general state of health, the risk of dying over a 20year period was onethird lower for grandparents who cared for their grandchildren，compared with grandparents who provided no childcare.Caregiving was associated with a longer life even when the care receiver wasn’t relative. Half of all childless seniors who provided support to friends or neighbors lived for seven years after the study began, while nonhelpers lived for four years on average.“Caregiving may give caregivers a purpose of life because they may feel useful for others and society. Caregiving may be thought also as an activity that keeps caregivers physically and mentally active，” said Professor Bruno Arpino.Arpino noted, however, that caregiving is not the only activity that can improve health and that too many caring responsibilities can take away from other beneficial activities like working, being in social clubs, or volunteering.“Children should take__into__account their parents’ needs, willingness, and desires and agree with them on the timing and amount of childcare，” he suggested.“It is very important that every individual decides for himself/herself, what ‘proper amounts o f help’ means，” Hilbrand said, adding, “As long as you do not feel stressed about the intensity(强度) of help you provide you may be doing something good for others as well as for yourself.”【解题导语】德国柏林一项研究发现，祖父母适当地帮忙照顾孙辈比不照顾孙辈的老年人寿命长。