课时训练(四) Units5—8(七下)

(限时:30分钟)

Ⅰ.单项选择

1.[2019·原创]IthinktheHUAWEIP20worksas astheiPhone8.Ilikeitverymuch. A.good

B.well

C.bad

D.badly

2.[2017·黄冈]—Ourclassroomissoclean.Who'scleanedit,LiFei? —Sorry,Idon'tknow.Ithink diditbeforeclass. A.somebody C.everyone

B.nobody D.anyone

3.[2018·黄冈]—DidQingdaoshow totheworldduringtheSCOSummit(上海合作组织峰会)? —Sure!Herbeauty,hightechnologyandrapiddevelopment. A.somethingspecial C.specialsomething

B.anythingspecial D.specialanything

4.[2018·淮安]Thegirlhasto hergrandmabecauseherparentsareworkinginanothercity. A.lookat

B.lookinto D.lookafter

C.lookthrough

5.[2018·德阳]Chinahas populationintheworld. A.big

B.thebigger

D.biggest

C.thebiggest

6.[2018·上海]MrZhouisgoodatcookingandhehasdecided hisownrestaurant. A.open

B.opened

C.toopen

D.opening

7.[2018·连云港]—Howamazingthisrobotis!

—Wow,ithasvideocamerasinitseyes,soit “see”andinteractwithpeople. A.may

8.—What'syourproblem?

—Ihavetrouble thesewordsinEnglish. A.say

B.saying

C.tospeak

D.speaking

B.can

C.must

D.should

9.[2018·河北]—Thebreadisreallydelicious. —Thankyou.I itmyself.

A.make

B.made D.ammaking

C.willmake

10.[2018·宿迁]— fineweatheritis!Shallwegohikinginthehills? —Whynot? A.What

B.Whata

C.How

D.Howa

Ⅱ.[2018·扬州二模]完形填空

Atthepicnic,TomandBeckyvisitedthecaveswiththeotherchildren.However,theyhadlefttheirfriendsbehindbeforetheynoticedthat.Theytooktheir

11

andwalkeddownasmalltunnel.Theymadesome

12

onthewall,whichwouldhelpthemfindtheirwayback.Alargenumberofbatswerehangingontheroof.Thebatsdidnotlikethec

andlelightand

13

thechildren.Tom

andBeckywereso

14

thattheykeptrunninguntiltheyescapedfromthebats.

“ItisalongtimesinceI 15 theothers.Let'sgoback,Tom,”saidBecky. Theytriedtofindawaybackwithoutgoingthroughthecavewithbats. 16 ,theyfailed.Bothchildrenbegantoshout 17 ,butnobodyanswered.

Beckybegantocry,“Tom,we'relost.We'll herandgavehersomecakeshehadtakenfromthe

20 .Theywentonshoutingforhelp,withoutanyreplyreachingthem.

Suddenly,theyheardsomebodyshoutingfaraway.Theyshoutedbackandtriedtogetcloser,buttherewasabigholeaheadofthemandtheycouldnotgoit.Theshoutingwentfurtherawayuntilitwasgone.

Tomdidn't 22 hope.Hetriedanothertunnel.Withallhis 23 ,hegotBeckyandhimselfoutatlast 24 hewasveryhungry,tiredandfrightened.

Theyhadbeeninthecaveforthreedays.TomsawaboatontheriverandaskedthepeopleinittotakethemtoSt.Petersburg.

Thepeopleinthetownwereveryhappytoseethe

25

21

18

getoutofthisawfulplace!”Tomtriedto

19

children.Bothofthemwereveryweakandhadtostayinbedforafewdaystogetstrongagain.

Whatafantasticexperienceforthetwo!Lifewillneversaynotothosewithgreatcourage! 11.A.food

B.drinks

C.candles C.marks

D.flashlights

12.A.pictures 13.A.attacked 14.A.pleased

B.notes D.colours D.avoided

B.admired B.frightened

C.attracted

C.nervous 15.A.caught

D.satisfied B.found

C.heard

D.followed

16.A.UnpleasantlyB.Unluckily C.Unexpectedly D.Uncertainly 17.A.insurprise B.withexcitement C.inconfidence D.withfear 18.A.surely 19.A.stop 20.A.cave 21.A.past 22.A.givein 23.A.effort 24.A.if

B.never

C.seldom

D.proudly

D.calm

B.refuse

C.please

B.tunnel

C.picnic C.up

D.boat D.through

B.down

B.giveup B.effect

C.giveout C.influence

D.giveaway D.information D.because

D.lost

B.although

B.strict

C.unless

25.A.excited C.serious

Ⅲ.[2018·连云港]阅读理解

Batsaretheonlymammalsthatcanflyagreatdistance,buttheyhaveanotherability.Manybatslivealongertimethanotheranimalsoftheirsize.

Europeanresearchersarestudyingbatstounderstandwhy

theylivesolong.Theyhopetomakediscoveriestofighttheagingprocess(过程)inhumanbeings.

Lastweek,thegroupofscientistssaidtheyhadfoundimportantbiologicalqualitiesinsomebatspecies.Thegroupstudiedbatchromosomes(

染

色

体),alineofgenesfoundinthenucleus(核)ofcells.Thescientistsweremostinterestedinpartsconnectedtotheendsofthechromosomes.Theyarecalledtelomeres(

端

粒).Telomeresprotecttheendsofchromosomes,whichshorteneachtimeacelldivides.Scientistsbelievethisshorteningprocesscausescellstobreakdown.

AreportonbatswaspublishedthismonthinthejournalScienceAdvances. Amongtheleadersofthestudywas

EmmaTeeling,abiologistwithUniversityCollegeDublininIreland.Teelingsaidstudyinglong-livingmammalsthathavedevelopedwaystofightagingisanotherwaytoprovethemolecular(子

)basisofextendedhealthlength.Sheaddedthatstudyingbatsmadescientistsabletolearnmor

分

eabouttheprocessesthatdrivehealthyaging.

TheEuropeanresearchersstudied493batsfromfourbatspecies.Thegroupusedinformationthathadbeengatheredovermorethan60years.Oftheseanimals,thegreatermouse-earedbatgenerallylivedthelongest,anaverageof37years.

Thescientistssaidthisandarelatedspecies,whicharegroupedtogetherunderthenameMyotis,hadtelomeresthatdidnotshortenwithage.AnotherMyotisbatholdstherecordforoldestage,reaching41years.

Thescientists'findingssuggestthatthesebats'cellshavetheabilitytokeepandrepairtheirtelomeres.This,theysaid,helpsguardagainsttheagingprocess.Basedonitsbodysize,abatlikethegreatermouse-earedbatwouldbeexpectedtolivefouryears.But,thesemammalshavebeenfoundtolivenearly10timeslongerthanthat.

Thescientistsfoundthateighteenofthesearebats.TheonlyexceptionisanunusualAfricanrodent,thenakedmolerat.

26.WhichsentencecanbeputattheendofParagraph3? A.Thismakesscientistsabletostudybats. B.That'swhybatscanflyagreatdistance. C.Theysaythisiswhatcausesaging.

D.Theydiscoverthecellsconnectedtohumans. 27.Whydosomespeciesofbatsliveaverylongtime?

A.Becausetheyhavealineoflong-livinggenesoutofthecells.

B.Becausetheircellshavetheabilitytokeepandrepairtheirtelomeres. C.Becausetheyhaveanotherabilitytolivelongerwithoutanyfoodorwater. D.Becausetelomeresprotecttheendsofchromosomestostopcellsdividing. 28.Theunderlinedword“that”refersto . A.fouryears

B.bodysize

D.theabilitytorepair

C.theagingprocess

29.What'sthebesttitleofthepassage? A.DifferencesBetweenLong-LivingAnimals C.DoBatsHoldtheSecrettoLongLife?

B.AScienceReportonChromosomes

D.AreHumansandBatsSimilarinProtectingThemselves?

Ⅳ.从方框中选择恰当的词或短语并用其正确的形式填空(每个词或短语只能用一次)

ascarefulas;hearfrom;doone'sbest;beafraidof;

sudden;growup

30.Don't dogs.Theyareveryfriendly.

31.Ihaven't mysonforalongtime.Imisshimverymuch. 32. ,Iheardababycryinginthenextroom.