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1、Unit 3 Tomorrows world (35分钟).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 sci
2、entists say time travel is theoretically possible,at least if you want to jump ahead to the future,but dont 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 eithe
3、r stretched or shrunk by motion.”In general,the closer youre 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 spac
4、ecraft(航空飞行器).In fact,you will have leaped 42 years into Earths 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 f
5、riends 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
6、 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
7、 these inconvenient time-travel problems,it remains a pretty widely held belief that traveling backwards in time isnt 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
8、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 peoples 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
9、 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 cant possibly travel faster than light.B.We cant stop the movement of the whole universe.C.We are more
10、 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 TrueB.Could Time Travel Be PossibleC.Why Is Man Fascinated by Time TravelD.How Can We Turn Time Travel into A Reality导学号235
11、00042.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 wa
12、s very 2.She couldnt 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 hom
13、eless 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
14、 mother told her that if she did something to change the problem that made her sad,she wouldnt 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
15、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 everyones spare change during “Make Change” month.More recently,the foundation began an
16、other 12 called National Red Scarf Daya day when people donate $20 and wear red scarves in support of Canadas 13 and homeless.There is an emergency shelter in Winnipeg called“Hannahs Place”,something that Hannah is very 14 of.Hannahs 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
