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1、Unit2Robotslanguagepoints课时作业i•完成句子I.Shetriedtoexplain（通过）signlanguage,butwestillcouldn*tunderstandwhatshemeant.2・Ifwecan（保持这个速度），weshouldarrivethereinabouttwodays・3.（大多数医生认为）lhatsmokingisextremelyharmfultohealth.4.WhentheysettledinAmerica,they（谋生）byrunningasmallrest
2、aurant.5.（据莎2）alienscanlivewithoutairorwater.6.Ithink（我很可能）getthejob,butifBobappliesforittoo,Iwillbehopeless.（likely）7.Heisveryinterestedin（所谓的流行歌曲）.8.（第一个到达的人）willwinagreatreward.【答案】l.bymeansof2.keepupthisspeed3.Themajorityofdoctorsthink4.madealife5.Itissaidthat6.F
3、mlikelyto7.whatarecalledpopularsongs8.ThefirstpersontoarriveII•阅读理解（2017北京卷,C）Measles（麻疹），whichoncekilled450childreneachyearanddisabledevenmore,wasnearlywipedoutintheUnitedStates14yearsagobytheuniversaluseoftheMMRvaccine（疫苗）•Butthediseaseismakingacomeback，causedbyagr
4、owinganti—vaccinemovementandmisinformationthatisspreadingquickly.Alreadythisyear,115measlescaseshavebeenreportedintheUSA,comparedwith189foralloflastyear.Thenumbersmightsoundsmall,buttheyaretheleadingedgeofadangeroustrend.Whenvaccinationratesareveryhigh,astheystillare
5、inthenationasawhole,everyoneisprotected.Thisiscalled"herdimmunity^,whichprotectsthepeoplewhogethurteasily,includingthosewhocantbevaccinatedformedicalreasons,babiestooyoungtogetvaccinatedandpeopleonwhomthevaccinedoesn'twork・Butherdimmunityworksonlywhennearlythewholehe
6、rdjoinsin.Whensomerefusevaccinationandseekafreeride,immunitybreaksdownandeveryoneisinevenbiggerdange匚That'sexactlywhatishappeninginsmallneighborhoodsaroundthecountryfromOrangeCounty,California,where22measlescaseswerereportedthismonth,toBrooklyn,N・Y・，wherea17—year—old
7、causedanoutbreaklastyear.Theresistancetovaccinehascontinuedfordecades,anditisdrivenbyarealbutverysmallrisk.Thosewhorefusetotakethatriskselfishlymakeotherssuffe匚Makingthingsworsearestatelawsthatmakeittooeasytooptout（决建不参加）ofwhataresupposedtoberequiredvaccinesforallchi
8、ldrenenteringkindergarten.Seventeenstatesallowparentstogetanexemption（豁免），sometimesjustbysigningapapersayingtheypersonallyobjecttoa
