课时作业16第一部分句型专练第一部分句型专练3.[2018·北京卷]Inanyunsafesituation,simplythebuttonandahighly-trainedagentwillgetyouthehelpyouneed.A.pressB.topressC.pressingD.pressed5.Itisnothowmuchwedobuthowmuchloveweputintowhatwedobenefitsourworkmost.7.Though（surprise）toseeus,theprofessorgaveusawarmwelcome.第二部分阅读理解  JustatthistimeNASAdecidedtotestsomenewhigh-altitudecamerasbytakingphotographsofYellowstone.Athoughtfulofficialpassedonsomeofthecopiestotheparkauthoritiesontheassumptionthattheymightmakeaniceblow-upforoneofthevisitors’centers.AssoonasChristiansensawthephotos,herealizedwhyhehadfailedtospotthecaldera:almostthewholepark—2.2millionacres—wascaldera.Theexplosionhadleftaholemorethanfortymilesacross—muchtoohugetobeseenfromanywhereatgroundlevel.AtsometimeinthepastYellowstonemusthaveblownupwithaviolencefarbeyondthescaleofanythingknowntohumans.1.WhatpuzzledChristiansenwhenhewasstudyingYellowstone?()A.Itscomplicatedgeographicalfeatures.B.Itsever-lastinginfluenceontourism.C.Themysterioushistoryofthepark.D.Theexactlocationofthevolcano.2.Whatdoesthesecondparagraphmainlytalkabout?()A.Theshapesofvolcanoes.B.Theimpactsofvolcanoes.C.Theactivitiesofvolcanoes.D.Theheightsofvolcanoes.3.Whatdoestheunderlinedword“blow-up”inthelastparagraphmostprobablymean?()A.Hot-airballoon.B.Digitalcamera.C.Bigphotograph.D.Bird’sview.B[2019·全国Ⅱ卷]  Bacteriaareanannoyingproblemforastronauts.Themicroorganisms（微生物）fromourbodiesgrowuncontrollablyonsurfacesoftheInternationalSpaceStation,soastronautsspendhourscleaningthemupeachweek.HowisNASAovercomingthisverytinybigproblem?It’sturningtoabunchofhighschoolkids.Butnotjustanykids.ItisdependingonNASAHUNCHhighschoolclassrooms,liketheonescienceteachersGeneGordonandDonnaHimmelbergleadatFairportHighSchoolinFairport,NewYork.  HUNCHisdesignedtoconnecthighschoolclassroomswithNASAengineers.Forthepasttwoyears,Gordon’sstudentshavebeenstudyingwaystokillbacteriainzerogravity,andtheythinkthey’reclosetoasolution（解决方案）.“Wedon’tgivethestudentsanybreaks.TheyhavetodoitjustlikeNASAengin