1、Unit 2Working the land.单项填空1The boy lay on his back，his teeth _ and his glaring eyes _.Aset；lookedBset；lookingCsetting；lookedDsetting；looking2People are struggling_ pollution.AforBagainstCtoDon3It is often said that _ teachers have _ very easy life.A/；/B/；aCthe；/Dthe；a4May I open the window to let i
2、n some fresh air?_ACome on.BTake care.CGo ahead!DHold on!5He expanded_ his new theory.AinBintoCaboutDon6Susan wanted to be independent from her parents.She tried _ alone，but she didnt like it and moved back home.AlivingBto liveCto be livingDhaving lived7.You were brave enough to raise objections at
3、the meeting.Well，now I regret_ that.Ato doBto be doingCto have been doneDhaving done8Anything to say about the latest talk between the two countries?_ANo comment!BNothing to say.CI beg your pardon?DGo ahead.9The factory is equipped_ modern machinery and _ the most recent techniques.Awith；usesBon；usi
4、ngCby；useDinto；to use10Its acknowledged that the traffic accident was largely_ the drivers carelessness.Abecause ofBdue toCthanks toDwith a result of11For all these years I have been working for others.Im hoping Ill_ my own business someday.Aturn upBfix upCset upDmake up12Some studies even suggest t
5、hat playing more_ bigger brains that are_ at reasoning and learning.Arefers to；goodBturns to；betterCsticks to；goodDleads to；better13If your wages are small，youll be free _ income tax.AwithBaboutCtoDof14_ in your class?AWhom do you think is the tallest studentBDo you think who is the tallest studentC
6、Who do you think is the tallest studentDWho you think is the tallest student15He will come tomorrow.But Id rather he _ the day after tomorrow.Awill comeBis comingCcameDhad come.阅读理解ATwo years ago，the Funk family of suburban Chicago adopted a Chinese baby girl who had been abandoned on a sidewalk nea
7、r a textile factory in Yangzhou.Last year，the Ramirez family of suburban Miami adopted a girl who had been abandoned a week later on the same spot.Both families named their daughters Mia.It turns out，a first name and Chinese heritage arent the only things the threeyearolds have in common.The girls m
8、othersHolly Funk and Diana Ramirezmet on a website for parents who had gone through international adoptions.After a lot of emails comparing photographs and biographical details，DNA testing proved the families suspicions: The girls are probably fraternal twins.“I was in shock，” said Ramirez，who lives
9、 with her husband Carlos in Pembroke Pines，Florida.“Well，now this is for real.”The Internet and Web groups revolving around international orphanages are increasingly being used to link adopted children with biological kin(亲属)The site that Funks and Ramirezes used has a membership of 137 people，with
10、15 sets of twins and 7 sets of siblings whose relationships have been confirmed.At a reunion at Chicagos OHare International Airport，Mia Diamond Funk and Mia Hanying Ramirez shyly surveyed each other，and then reached for each others hand.DNA tests establish an 85 percent probability that the girls a
11、re at least halfsisters.Scientists do not have a biological parent to test and reach a greater certainty，but given their ages and physical similarities，experts say it is likely they are fraternal twins.Douglas and Holly Funk hope to bring their Mia to Miami in October.Both sets of parents say they a
12、re committed to staying in touch and often let the two sisters talk to each other on the phone.16Both the adopted girls shared a first name _.Abecause they both came from ChinaBbecause of their physical similaritiesCbecause their US parents suspected they were twinsDfor no good reason17Why did the g
13、irls mothers meet on the Internet?ATo compare photographs of the two girls.BTo find the girls biological kin.CTo test their suspicions.DTo know how to adopt children.18Experts are still not 100 percent sure that the two girls are fraternal twins because _ADNA tests are still not accurate enoughBthe
14、two girls were born in two different familiesCthe DNA of a biological parent is still missingDone girl was born a week later than the other19What Ramirez said in Paragraph 4 suggests that she _.Adidnt believe what had happenedBwas surprised at what had happenedCdidnt want to accept the factDwas plea
15、sed with what they had done20What would be the best title for the passage?AAdopted Sisters Are ReunitedBAdopted Sisters Live Happily in the USCSuspicion Turned into RealityDThe Stories of Two FamiliesBThe earth，moon，sun and all visible stars in the sky make up less than one percent of the universe.A
16、lmost all the rest is dark matter and dark energy，unknown forces that puzzle astronomers.Observations in recent years have changed the basic understanding of how the universe evolved and have indicated how little is known about the major forces and substances that shaped our world.Astronomers now kn
17、ow that luminous(发光的) matterstars，planets and hot gas.accounts for only about 0.4 percent of the universe.Nonluminous components，such as black holes and intergalactic(星系间的) gas，make up 3.6 percent.The rest is dark matter，about 23 percent，and dark energy，about 73 percent.Dark matter，sometimes called
18、“cold dark matter”，has been known for some time.Only recently have researchers come to understand the key role it played in the formation of stars，planets and even people.“We owe our very existence to dark matter，” said physicist Paul Steinhardt.“Dark matter dominated the structure formation in the
19、early universe，” Steinhardt said.“For the first few billion years dark matter contained most of the mass of the universe.You can think of ordinary matter as a froth(泡沫状物) of an ocean of dark matter.The dark matter dumps and the ordinary matter falls into it.That led to the formation of the stars and
20、 galaxies(星系)Without dark matter，there would be virtually no structure in the universe.”The nature of dark matter is unknown.It cannot be seen or detected directly.Astronomers know it is there because of its effects on celestial (天上的) objects that can be seen and measured.But the most dominating for
21、ce of all in the universe is called dark energy, a recently proven power that astronomers say is causing the galaxies in the universe to separate at a faster and faster speed.21We know from the text that _.Aall visible stars are very important in the universeBthe basic understanding of the universe
22、evolution was totally wrongCdark matter is also known as dark energyDdark energy makes up about three quarters of the universe22The text tells us “dark matter” _.Aplays an important part in forming stars，planets and humansBhas been fully understood by researchersCremains an unimportant force to the
23、universe like dark energyDhas nothing to do with the formation of the universe today23“The major forces and substances that shaped our world” (in Para.2) refers to _.Aluminous matterBnonluminous matterCdark matterDordinary matter24According to Paul Steinhardt，our existence today _.Adepends mainly on
24、 dark matterBhas something to do with ordinary matterCresults from the formation of celestial objectsDevolves from the mass of the universe25Which of the following is the best title for the passage?ADark Matter or Dark EnergyBThe Formation of the UniverseCDark Forces Dominate the UniverseDUnknown Forces Puzzle Astronomers1.B 2.B 3.B 4.C 5.D 6.A 7.D 8.A 9.A 10.B 11.C 12.D 13.D 14.C15.C 16.D 17.B 18.C 19.B 20.A 21.D 22.A 23.C 24.A 25.C