课时作业(四十二)选修7Unit21HumanBiology第2课时Ⅰ.完形填空ShortlyaftermydaughterJuliaAnnwasborn，IstartedalovingtraditionthatIknowothers(withwhomIhavesubsequentlysharedthisspecialplan)havealsostarted.Everyyear，onher__1__，IwriteanAnnualLettertomydaughter.I__2__itwithfunnyanecdotes(轶事；趣闻)thathappenedtoherthatyear，hardshipsor__3__，issuesthatare__4__inmylifeorhers，worldevents，my__5__forthefuture，miscellaneous(各种各样的)thoughts，etc.Iadd__6__theletterphotographs，presents，reportcardsandmany__7__typesofmementos(纪念品)thatwouldcertainlyhaveotherwise__8__astheyearspassed.Ikeepa__9__inmydeskdrawerinwhich，allyearlong，IplacethingsthatIwantto__10__intheenvelopecontaininghernextAnnualLetter.Everyweek，ImakeshortnotesofwhatIcanthink__11__fromtheweek’seventsthatIwillwantto__12__laterintheyeartowriteinherAnnualLetter.__13__herbirthdayapproaches，Itakeoutthatfolderandfindit__14__withideas，thoughts，poems，cards，treasures，stories，incidentsandmemoriesofallsorts—manyofwhichIhavealreadyforgotten—and__15__Ithen__16__transcribe(抄写)intothatyear’sAnnualLetter.Oncetheletteriswrittenandallthe__17__areinsertedintotheenvelope，Isealit.Itthenbecomesthatyear’sAnnualLetter.OntheenvelopeIalwayswrite“AnnualLettertoJuliaAnnfromherdaddyonthe__18__ofherbirthdaytobeopenedwhensheis21yearsold.”Itisatimecapsuleoflovefromeverydifferentyearofherlife，toherasanadult.Itisagiftof__19__memoriesfromonegenerationtothenext.Itisa__20__recordofherlifewrittenasshewasactuallylivingit.1．A.schoolingB．partyC．birthdayD．record2．A.openB．fillC．endD．tell3．A.disappointmentsB．joysC．sadnessesD．treatments4．A.littleB．possibleC．usualD．important5．A.predictionsB．giftsC．reasonsD．hobbies6．A.onB．upC．withD．to7．A.otherB．anotherC．allD．any8．A.lastedB．happenedC．disappearedD．met9．A.envelopeB．bagC．boxD．folder10．A.sealB．includeC．wishD．pay11．A.ofB．aboutC．overD．for12．A.helpB．giveC．recallD．mind13．A.AlthoughB．WhenC．WhatD．Who14．A.runningB．quarrellingC．fillingD．overflowing15．A.thenB．whenC．whichD．how16．A.eagerlyB．curiouslyC．sadlyD．willingly17．A.cardsB．plansC．presentsD．treasures18．A.occasionB．timeC．momentD．year19．A.excitingB．interestingC．lovingD．confusing20．A.temporaryB．permanentC．cautiousD．powerfulⅡ.阅读理解(·南昌调研)Atfirst，theearth’ssurfacelayer(层)wasmadeupofhugeblocksofhard，solidrocks.Thenslowly，thererocksbrokeupintosmallerandsmallerpieces.Finallystones，pebbles(砾石)andgrainsofsandwereformed.Manysortsofplantsandanimalslivedanddiedonthesurfaceoftheearth.Theirremainsmixedupwiththestones，pebblesandformedsoil.Theoutmostlayeroftheearthissoil.Therearemanywaysinwhichlargepiecesofrockbreakupintosmallerones.Wind，water，heatandcoldhelptobreakuprocks.Whenwindsblowgrainsofsandagainstalargerockforalongtime，thesofterlayersoftherockareslowlywornaway.Theseleaveholesandcracks(裂缝)intherock，whichbecomebiggerandfinallytherockbreaksupintosmallerpieces.Themovingwaterofstreamsandriversalsohelpstobreakuprocks.Asthewatermovesalong，itcarrieswithsmallpiecesofrock.Theserubthelargerones.Thus，thelargerrocksareworndowntosmallerpieces.Theheatofthesunisalsohelpfulinbreakinguprocks.Whenthesunshines，therocksbecomeveryhot.Iftheserocksaresuddenlycooled，theymaycrack.Icealsoplaysapartinmakingsoil.Waterinthecrackscanturnintoiceincoldweather.Asthishappens，itbecomesb...
