北师大版高中英语选修七Unit 21《Human Biology》能力提升.docx

北师大版高中英语选修七Unit 21《Human Biology》能力提升.docx

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北师大版高中英语选修七Unit21《HumanBiology》能力提升

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素能提升演练（二十一）

选修7Unit21

Ⅰ．用所给词的适当形式填空

1.Thelocalpeopleare_________tobuildingthenewhotelbecauseofthegreatcost.（oppose）

2.Weshouldbe_________toourfriends.（faith）

3.Itisa_________tobeinvitedtospeakhere.（privileged）

4.Thesportsmeetingofourschoolisheld_________.（annual）

5.OurEnglishteacherwon’t_________anycheatinginexams.（tolerate）

6.Theboydidn’tgohomeattheusualtimeandhisparentswere_________abouthissafety.（concern）

7.Smokingisstrictly_________intheprocessofhandlingexplosivematerial.（prohibit）

8.Thedriverwaspunishedfor_________thetrafficrules.（violate）

9.Theycan’thave_________howthingswillturnout.（foresee）

10.Thesportsmeetingwas_________becauseofrain.（postpone）

Ⅱ.完成句子

1.假如她昨天邀请我参加聚会，我就去了。

Ifshehadinvitedmeyesterday,I____________________.

2.有必要保持办公室的整洁。

_______________tokeeptheofficesneat.

3.人们相信“泰坦尼克号”是在撞上冰山之后沉没的。

Titanic__________________afterhittinganiceberg.

4.看来非常遗憾，杰克没能够及时登机。

________________thatJackdidnotboardtheplanetimely.

5.他们夺走了人民的自由。

They_______thepeople____theirliberty.

Ⅲ．单项填空

1.Whenwetalkaboutbreakingrecords,we_______theissueofperformance-enhancingdrugs.

A.comeaboutB.comeacross

C.comearoundD.comealong

2.Itiscompulsoryforwinnerstobetestedbutotherparticipantsareonlytested_______.

A.inadvanceB.bychance

C.atrandomD.atallcosts

3.［2018合肥模拟］Thecityiswellknownforitseducationofgoodquality,however,itsstandardsofeducationhave_______inrecentyears.

A.distributedB.contributed

C.cancelledD.declined

4.Whenyouareolderandexperiencemoreoflife,youwillbebettermentally_______todealwithwhateverhappens.

A.offeredB.providedC.equippedD.supplied

5.［2018唐山模拟］JennyhopesthatMr.SmithwillsuggestagoodwaytohaveherwrittenEnglish_______inashortperiod.

A.improvedB.improving

C.toimproveD.improve

6．Itwastoohardforthefirefighterstogetclosetotheburningbuilding.Alltheirattemptstorescuethepeopletrappedwere_______.

A.invainB.inreturn

C.inplaceD.indanger

7.Theoldladycametothepolicestationandclaimed_______ofherpursewhenshewasshopping.

A.toberobbedB.toberobbing

C.torobD.tohavebeenrobbed

8.［2018宣城模拟］Nobodycan_______hisrudebehavior,andthat’swhyhehasnofriends.

A.accustomB.understand

C.coverD.tolerate

9.Itwasanunpopulardecisiontopostpone_______thenewschool.

A.buildingB.tobuild

C.havingbuiltD.tohavebuilt

10.Ifearthatapriorengagementwill_______mefromjoiningyouatdinner.

A.disagreeB.prohibit

C.gatherD.produce

11.HetoldusthathewasgoingtoBeijingto_______hisfortune.

A.seekB.researchC.pickD.earn

12.［2018福州模拟］EachmembercountryofWTOmust_______itslawsandregulationsandcompeteontheprincipleoffairnessandcooperation.

A.catertoB.correspondto

C.relatetoD.submitto

13.Doesthecommonman_______theideaofpoliticalunionbetweenEuropeancountries?

A.deliverB.opposeC.smoothD.equal

14.［2018池州模拟］Youmusttryto_______thememoryoftheseterribleevents.

A.makeoutB.wipeout

C.pickoutD.workout

15.Wehavelost_______inhimandmistrustedhim.

A.dependenceB.faith

C.beliefD.confidence

Ⅳ．阅读理解

（A）

Eachcellinthehumanbodycontainsabout25,000to35,000genes,whichcarryinformationthatdeterminesyourtraits.Traitsarecharacteristicsyouinheritfromyourparents;thismeansyourparentspasssomeoftheircharacteristicsontoyouthroughgenes.Forexample,ifbothofyourparentshavegreeneyes,youmightinheritthetraitofgreeneyesfromthem.Orifyourmomhasfreckles（雀斑）,youmightinheritthattraitandwindupwithafreckledface.Andgenesaren’tjustinhumans—allanimalsandplantshavegenes,too.

Geneshangoutalllineduponthread-likethingscalledchromosomes（染色体）.Chromosomescomeinpairs,andtherearehundreds,sometimesthousandsofgenesinonechromosome.ThechromosomesandgenesaremadeofDNA,whichisshortfordeoxyribonucleicacid.

Chromosomesarefoundinsidecells,theverysmallunitsthatmakeupalllivingthings.Acellissotinythatyoucanonlyseeitthroughthelensofastrongmicroscope,andtherearebillionsofcellsinyourbody.Mostcellshaveonenucleus.Thenucleus,whichissortofegg-shaped,islikethebrainofthecell.Ittellseverypartofthecellwhattodo.Howdoesthenucleusknowsomuch?

Itcontainsourchromosomesandgenes.Tinyasitis,thenucleushasmoreinformationin