内容发布更新时间 : 2024/11/14 11:53:37星期一 下面是文章的全部内容请认真阅读。

Unit 3 Tomorrow’s world (35分钟) Ⅰ.阅读理解 (2018·湖南十校联考)

Time travel is a familiar subject of science fiction(小说)and fantasy

stories,from H.G.Wells to Rod Serling to Hot Tub Time Machine.But could time travel ever be possible in real life?And,if so,how would humans even handle so advanced a technology?

Some scientists say time travel is theoretically possible,at least if you want to jump ahead to the future,but don’t start saving up for a time machine just yet.As physicist Paul Davies explained for CNN in 2013,“Over a century ago,Albert Einstein showed that time is actually flexible.That is,it can be either stretched or shrunk by motion.”

In general,the closer you’re going to the speed of light,the slower time

moves.“Fly to the star Vega,25 light years away,and back again at 99% of the speed of light,and when you return to Earth in 2062,you will have experienced only seven years’ travel time in the spacecraft(航空飞行器).In fact,you will have leaped 42 years into Earth’s future,” Paul Davies wrote.

So if you were to,theoretically,take a trip in a super-fast spaceship,you might feel (and look) as though only a few years had passed,but when you arrived back on Earth,decades would have passed and all your friends and family would be dead and gone.Time travel!

But what about going backwards?Could it ever be possible to pop back in time and stop bad things from happening and good people from dying?Theoretically,if you were to travel faster than the speed of light,you would be moving backwards in time.

But most scientists believe that nothing can actually travel faster than

light,and,if you could go back in time,messing with the past would create all kinds of unsolvable problems,like what if you went back in time and killed your grandpa!

Although some theories have attempted to propose(提议)solutions to these inconvenient time-travel problems,it remains a pretty widely held belief that traveling backwards in time isn’t possible for us humans.After all,as physicist Stephen Hawking said in his book A Brief History of Time,“If time travel is possible,where are the tourists from the future?”

1.Why does the author mentions H.G.Wells and Rod Serling? A.To stress the importance of reading. B.To introduce two great writers to us.

C.To encourage readers to share their ideas.

D.To show people’s constant interest in space travel.

2.What will you have to do if you wish to travel to the future? A.Travel as far as 25 light years.

B.Travel in the spacecraft for 7 years. C.Travel at a speed close to that of light.

D.Start saving up for a time machine from now on. 3.Why is going backward less likely to happen? A.We can’t possibly travel faster than light.

B.We can’t stop the movement of the whole universe. C.We are more interested in going to the future.

D.We have to stop bad things from happening and good people from dying. 4.Which of the following can be the best title? A.Time Travel Is Coming True

1

B.Could Time Travel Be Possible

C.Why Is Man Fascinated by Time Travel

D.How Can We Turn Time Travel into A Reality

?导学号23500042?

Ⅱ.完形填空

(2017·北京卷)

Hannah Taylor is a schoolgirl from Manitoba,Canada.One day,when she was five years old,she was walking with her mother in downtown Winnipeg.They saw a man 1 out of a garbage can.She asked her mother why he did that,and her mother said that the man was homeless and hungry.Hannah was very 2 .She couldn’t understand why some people had to live their lives without shelter or enough food.Hannah started to think about how she could 3 ,but,of course,there is not a lot one five-year-old can do to solve(解决)the problem of homelessness.

Later,when Hannah attended school,she saw another homeless person.It was a woman, 4 an old shopping trolley(购物车)which was piled with 5 .It seemed that

everything the woman owned was in them.This made Hannah very sad,and even more 6 to do something.She had been talking to her mother about the lives of homeless people 7 they first saw the homeless man.Her mother told her that if she did something to change the problem that made her sad,she wouldn’t 8 as bad.

Hannah began to speak out about the homelessness in Manitoba and then in other provinces.She hoped to 9 her message of hope and awareness.She started the

Ladybug Foundation,an organization aiming at getting rid of homelessness.She began to 10 “Big Bosses” lunches,where she would try to persuade local business leaders to 11 to the cause.She also organized a fundraising(募捐)drive in “Ladybug Jars” to collect everyone’s spare change during “Make Change” month.More recently,the foundation began another 12 called National Red Scarf Day—a day when people donate $20 and wear red scarves in support of Canada’s 13 and homeless.

There is an emergency shelter in Winnipeg called“Hannah’s Place”,something that Hannah is very 14 of.Hannah’s Place is divided into several areas,providing shelter for people when it is so cold that 15 outdoors can mean death.In the more than five years since Hannah began her activities,she has received a lot of

16 .For example,she received the 2007 BRICK Award recognizing the 17 of young people to change the world.But 18 all this,Hannah still has the 19 life of a Winnipeg schoolgirl,except that she pays regular visits to homeless people.

Hannah is one of many examples of young people who are making a 20 in the world.You can,too!

1.A.jumping B.eating C.crying D.waving 2.A.annoyed B.nervous C.ashamed D.upset 3.A.behave B.manage C.help D.work 4.A.pushing B.carrying C.buying D.holding 5.A.goods B.bottles C.foods D.bags 6.A.excited B.determined C.energetic D.grateful 7.A.since B.unless C.although D.as 8.A.sound B.get C.feel D.look 9.A.exchange B.leave C.keep D.spread 10.A.sell B.deliver C.host D.pack 11.A.contribute B.lead C.apply D.agree 12.A.campaign B.trip C.procedure D.trial 13.A.elderly B.hungry C.lonely D.sick 14.A.aware B.afraid C.proud D.sure 15.A.going B.sleeping C.travelling D.playing

2

16.A.praises C.replies 17.A.needs 18.A.for 19.A.healthy 20.A.choice B.invitations D.appointments

B.interests C.dreams B.through C.besides B.public C.normal B.profit C.judgement

D.efforts

D.along D.tough

D.difference

?导学号23500043?

Ⅲ.语法填空

(2017·河南豫南九校质量考评七)

Researchers from the University of Michigan have found that astronauts’ brains change shape during spaceflight.It is the first study 1.

(look)into how the brain changes in space.Researchers looked at high-tech MRI(磁共振成像) pictures of the brains of 26 astronauts who spent time in space.Twelve of the 2.(astronaut)spent two weeks on the Space Shuttle,and 14 spent six months on the International Space Station.All of them 3. (experience)increases and decreases in the size of 4. (differ)parts of the brain.The longer an astronaut spent in space,the 5.(big)the size differences were.

The research produced some 6. (interest) findings.One was that on gravity means fluids do not drop in the body,7. there is a shift in the brain’s position inside the skull.The brain becomes either smaller or bigger.The findings could help doctors to treat problems that affect the brain’s function.They could treat people with problems 8. (cause) by long-term bed rest.They could also help those who have a build-up of fluid in the brain,which can lead 9. brain damage.We will understand more about 10. neurons(神经元) in the brain connect.The findings will also help future trips to Mars.

?导学号23500044?

Ⅳ.书面表达

(2017·山西实验中学质量检测)

假定你是李华,你校的交流生Lucy下周打算去老师家做客,但是她不知道中国人做客有哪些传统,她给你发了一封电子邮件,请你给她一些建议。请你依据下列要点,给她回复一封电子邮件。

要点如下:1.适当地送一些礼物; 2.介绍中国的餐桌礼仪。

注意:1.词数100左右。(开头和结尾已给出,不计入总词数) 2.可以适当增加细节,以使行文连贯。 Dear Lucy,

I have received your email.You asked me for some suggestions on how to be a guest in China. _____

_____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________

I do hope you will enjoy yourself in your teacher’s home.

Yours sincerely,

Li Hua

?导学号23500045?

3