懂你英语Level5 Unit 1

---来源搜集，文内均可编辑---来源搜集，文内均可编辑PAGE18---来源搜集，文内均可编辑L5Unit1-1ListeningJessicawas35yearsold.Shegraduatedfrommiddleschool20yearsago.Thisyearhermiddleschoolclasshadits20thyearclassforreunion.Allofherclassmatesandteacherswereinvitedtoattend.It’stogoingtobeheldatthehotel,nearwheretheirschoolusedtobe.Likemanyotherbuildings,theschoolhadbeentorndown.Ithadbeenreplacedbysomeoftheapartmentbuildings.Atfirst,shewasn’tsureifshecouldgotothereunion.Onereasonwasthattherewasn’tanyoneinparticularthatshewantedtosee.Anotherreasonwasthatshewasverybusy.Shewasaworkingmother,withaboy8yearsoldandherhusbandwhowasrarelyathome.Goingtothereunionmeantthatshewouldhavetoarrangesomeonetotakecareofthingswhileshewasaway.Thatwouldn’tbeeasy.Shedidn’twanttotakeherboywithherandherhusbandwouldn’ttaketimeofffromwork.ThenshegotamessagefromSharon,oneofherclassmates.Sharonwascontactingpeoplefromtheirclassandurgingeveryonetocome.Intheschooldays,shewasclassmonitor,andnowshewashelpingtoorganizethereunion.TheyexchangedthemessagesandJessicasaidshecouldn’tmakeit.ThenSharongaveheracallandtheytalkedforalmostanhour.SharonreallywantedhertocomeandsodidacoupleofJessica’soldfriends.Theywereallwonderinghowshewasdoing.Noneofthemhaveseenorheardfromhersincegraduation.Theywereespeciallycurioussinceshehadn’tgonetotheirfirstreunion10yearsbefore.Jessicadecidedtoarrangethingssothatshecouldgo.Herhusbandfinallyagreedtotakecareofthingswhileshewasaway.HeagreedtodoitbecausehermotherhadofferedtocomeandstayforawhilesoJessicacouldattendthereunion.Sinceheandhermotherdidn’tgetalong,hedecidedtochangehisscheduleandworkfromhomeforafewdays.Hereallydidn’twanthermothertocomethoughhedidn’tsayso.Whenshegottothereunion,shewasshocked.Everyonehadagedsomuchandmanyofthemwereoutofshape.Somewhousedtobegood-lookinghadlosttheirlookscompletelyandotherslookmuchbetterandbefore.Itwasstrangehowtimehadchangedpeopleinsuchdifferentways.Anyway,shedecidedthatsinceshewasthere,shewouldtrytoenjoyit.L5Unit1-1vocabularyToreplacesomethingmeanstoputsomethingelseinitsways.Whensomethinggetsoldandbeginstobreakdown,itmayneedtobereplaced.Totearsomethingdownmeansbreakitapart.Totearapersondownmeanstohurtthembysayingnegativethingsaboutthem.Toconstructsomethingsmeanstobuilditorputittogether.Largeconstructionprojectsincludebuildings,bridgesandorganizations.Theoppositeofconstructiveisdestructive.Toorganizesomethingmeanstoarrangethingsinelderlylogicalway.Anorganizationissomethingthathasalogicalstructuresuchasawell-managedcompany.Tosupportsomethingsuchanideaistohelporaddstrengthtoit.Theoppositeofsupportistoundermine(逐渐削弱)orweaken.Publicinformationisavailabletoanyonewhowantstoknowit.ifastoreisopentothepublic,itmeansanyonecancomein.Privateinformationisnotopentoeveryonebutit’sonlyavailabletotrustedfriendtofamily.Informationaboutone’ssecrethopesordreamsisusuallyprivate.Confidentialinformationissecretinformation.Confidentialisnotsupposedtobesharedwithothers.Gossipisinformationthatisoftenbeexchangedbecauseofitsexcitingandfun,eventhoughitmaybenotbetrue.Offeringgossipisoftenentertainingbutitcanoftenbedamaging.Opinionsarewhatpeoplethinkandfeelaboutsomethingasitsupposedtofactualinformation.Factualinformationisbasedonfactsorevidence,butopinionsarewhatpeoplethinkorfeel.Theyaretoodisorganizedtogetanythingdoneontime.Toreplacesomethingmeanstooutsomethingelseinitsplace.Theoppositeofconstructisteardown.Opinionsoftendiffer,andwhentheydopeoplemayargue.Gossipisinformationthatisoftenmadeuporexaggerated.Thepasswordtoyourbankaccountinformationisprivateinformation.Manypeoplemakemoneybyinvestinginpubliccompanies.Revealingconfidentialinformationmaybeillegal.Gossipmayhurtorembarrassthepersonbeinggossipedabout.L5Unit1-1dialogueIsthistheAceservicecenter?Yes,itis,Sir.MayIhelpyou?Yes,I’mcallingtocomplainingaboutyourservice.Certainly,sir.I’msorrytohearthat.Letmeseeifthat’ssomethingIcandotohelpyou.Pleasetellmewhathappened.Iorderanewwashingmachineatnewwebsite.Itwasmorethanaweekago.Beforeyougoon,mayIhaveyourordernumberplease?Sure,it’sabc1005.AndmayIhavethelast4digitsofyoursocialsecuritynumber?Idon’thaveasocialsecuritynumber.I’manillegalalien.Veryfunny,sir.Ok,then.What’syourfirstpet’sname?Mr.Kidi.OK,Iseeyourallinformation.Now,what’syourproblem?Iorderedanewwashingmachineandpaidforit.ThenIchosethedeliverydateforasetofchoices.Itwassupposedtobedeliveredtoday,butit’sstillnothere.Didanyonecontactyou?No,Ihaven’treceivedmessages.I’msorrytohearthatsir.Iseeherethatthewashingmachineyouorderedhasn’tarrivedinourwarehouse(仓库)yet.Itcanbedelivereduntilnextweek.Youdon’tevenhaveityetWhyhaven’tIbeennotified.Itooktimeofffromworktobeathometoday.Youshouldhavebeennotifiedbyphoneoremail.Iwasn’t.Ihaven’treceivedanynotification.Thisisveryupsetting.Iunderstand,sir.I’mreallysorryforthis.Beingsorryisn’tenough.I’mreallyupset.Thisisnowaytodobusiness.Yes,sir,Iunderstand.Icansendyoua50-dollargiftcouponasawaytoexpressourappreciationforyourpatience.Idon’tcareaboutthemoney.Idon’tblameyouofcoursebutIwantyoutoknowhowdisappointedthatIamwithAce.Iexpectedmuchbetterservice.I’mreallysorry,sir.IsthatanythingelsethatIcandoforyou?Yes,thatis.I’dliketocanceltheorderandgetarefund.I’msorrytohearthat,sir.ButIunderstand.I’llseetoitthatyougetyourrefund.HowlongwillittakebeforeIgettherefund?Youshouldseethecreditonyournextmonth’screditcardbillingstatement.Thanksforyourhelp.Youarewelcomesirandonceagain,pleaseacceptmyapologies.L5Unit1-2ListeningJessica’s20-yearclassreunionwasheldatafancyhotel.Whenshearrived,shewasn’tsureshewasintherightplace.Atfirst,shedidn’trecognizeanyone.Shefeltabitawkwardandoutofplace.Butitwasn’tbeforeastrangemancameuptoher.Hewasalreadylosinghishearandhewaswearingthickglasses(深度眼镜).Don’tyouremembermeHeasked.Whenhesaidwhohewas,shebarelyrememberedhim,especiallyhehaschangedsomuch.Thenhetoldherthathehadalwayshadcrushonher.Hesaidshelookedbeautifulandheimmediatelytookaselfieofthem,withhisarmtightaroundherwaist.Thismadeherfeltabitstrange.Shesmiledathimandpretendedtobehappytoseehim.Butinfact,shewassurehowtoreact,thoughtheseemednice.Shefinallyexcusedherselfandwenttotheladies’room.Shewasbeginningtoregrettohavingcometothereunion.Shehadalwaysbeenshyandshestillwas.Whenshereturnedtotheparty,Sharoninvitedhertositathertable.Dinnerwasgoingtobeservedsoonandsomeoftheclassmatesweregoingtogivespeeches.Sharonnextwasalsogottosayafewwordstoobecausepeoplewerecurious.Thiswasasurprise.Jessicahadneverbeenverypopularandshedidn’tthinkanyonehadnoticedher.Shehadalwaysfeltlikeanoutsider,withonlyacoupleofclosefriends.Still,shehadbeenoneofthebeststudentsandpeoplerememberedher.Astheeveningworeon,Jessicabegantoreallyenjoyherself.Shetoldtoheroldfriendsandwasamazedbyhowsomeothershadchanged.Forexample,Tomusedtobegoodlookingandathletic.Hewasoneofthemostpopularstudents,andstarbasketballplayer.Hisoneproblemwasmath.Hehadhadhardtimeinmathespeciallyingeometric.Thisisbecausehewasn’talogicalthinker.Exceptforbasketball,hedidn’twanttodoanything,unlessitwaseasy.Tomwasnolongergoodlooking.Hisnosewhichhadalwaysbeenlarge,hadgrownevenlarger.Hehadalsogainedalotofweight.Hiswifehadlefthimsoforthefirsttimeandever,hewaslone.Helookedlonelyanddepressed,notatalllikeheusedtobe.Stevewasanobodyinmiddleschool.Peoplehardlynoticedhim.Hewassmall,quietandabituglywithcrookedteeth.WhathewasgoodatwasEnglish.HisEnglishwasevenbetterthantheirteachers.Aftergraduating,hewenttolowrentuniversityandeventuallydroppedout.Forawhile,heworkedasatourguide.Then,10yearsago,heandsomefriendsstartedalittlecompanywhichisnowagreatsuccess.Infact,hehadbecomearich,generousman.Hehadanicewarmsmileandhissuccesshadn’tgonetohishead(冲昏头脑).Itwasapleasuretobearoundhim.Bettyusedtobethemostbeautifulgirlinschool.Shewasn’tverysmartbutshewasagreatsinger.Shemadeavideoofhersinginganditwentviral.Shebecamefamousovernightbutitonlylastedforabout2years.Afterthat,herfanslostinterestedinher.Shetriedtobecomeanactress,butshefailed.Shehasbeentoostiffandnervousinfrontofthecamera.Bettyhasanicehusbandwhoseemstoadopther.Theonetragedyinherlifehappenedabout5yearsagowhenshelostherdaughtertoarareformofcancer.Becauseofthat,herhairhadbeguntoturngrey.Jessicacouldn’thelpbutfeelsorryforher.Bettyhadhadsuchhighhopeintremendousenergyasagirl,butthingsdidn’tworkout.AndthentherewasJohn.Johnusedtobetheschoolbully.Hehadbeenbig,strongandmean.Hehadn’tbeennicetoanybody.Itseemedthathewasalwaysangryandreadytohitsomeone.Aftergraduating,hejoinedthearmyandwentoverseastofighttoawar.Hissawmanypeoplediedandhegrewtohatefightingofanykind.Thenoneday,hewasnearlykilledwhenahelicopterhewasinwasshutdown.Hesurvivedthecrash(事故)buthelostalegandwashospitalizedfornearlyayear.Nowhehadcompletelychanged.Hehadgentle,kindeyesandbeautifulsmile.Hewasworkingforanorganizationthatprovidessupporttoelderlypeople.FromJessica’spointofview,johnhadturnedouttobeawonderfulsurprise.Intheend,Jessicawasgladshewenttoherreunion.Itwasinterestingtoseehowpeoplehadchangedthroughtheseyears.Still,shewashappytogethomeandappreciateeverythingthatshehad.go(viral像病毒一样传播开来bepreparefor为…作准备)L5Unit1-2vocabularyAbrokenheartiswhathappenswhenaloverelationshipisbrokenoff.Someonewiththebrokenheartisusuallydepressedwhichmeanstheyfeelawfulanddon’tenjoylife.Tofallinlovewithsomeonecanbeawonderfulexperience,withpowerfulemotions.Peopleinloveoftensharetheirdeepestfeelingsandemotions,whichisintimacy(n.亲密;亲近;亲昵的言行;性行为).Tofindsomeoneattractiveusuallymeansthereisaphysicaldesiretobewithhim.Physicalattractionmaysometimesleadtolove,Butinmanycases,itmayonlyleadtoashorttermsexualrelationship.Toflirt(调情)withsomeonemeanstolethimorherknowthatyouwanttobeapproached.Somepeopleusetheireyesorsmiletoflirt.Jealousyiswhatoftenhappenswhentwopeoplecompetefortheloveofthesameperson.Theonewholosesmaybeveryjealousoftheotherandtriestobreakthingsup.Rivalsinsult辱骂Feelingsofjealousymaylastforalongtimeandcandestroyfriendship.Somepeoplecanremaincalmevenwheneveryoneelseisconfusedandupset.Whenyouarecalm,youcanthinkclearlyandmakegooddecisions.Peoplereacttodisappointingnewsindifferentways.Sometimestheygetdiscouragedandlosetheirconfidence.Sometimestheygetdepressedandbegantocryorevengetdrunk.Peoplearefuriouswhentheyareinextremelyangry.Peoplewhoarefuriousateachothermaybeendupfightingortryingtohurteachother.Tobeexcitedisusuallyagoodthing.Peoplecanbecomeexcitedwhilewatchingasoccermatchandseeingtheirteamscoreagoal.Theoppositeofexcitingisdollorboring.Someoneisterrifiediftheyareextremelyafraidandshakingwithfear.Terrifiedpeoplewilloftenscreamandrunawayfromwhateveristhreateningthem.Beinginlovecanblindyoufromseeingthingsastheyreallyare.Theemotionsoflovehaveinspiredpoetsthroughouthistory.Whenyouareinlovewithsomeoneyoucanhardilythinkofanythingelse.L5Unit1-2dialogueWhatareyousoexcitingabout?HaveyouheardJohnandSylviaaregettingadivorce.No,Ihaven’t.ButI’mnotsurprised.Tobehonest,Ineverexpectedtheirmarriagetolastforverylong.Sheissoaggressiveandbossy(专横的).Well,IthinkJohnhasanaffair.Hemetsomeoneonthebusinesstrip.Really,howdidyoufindthatout.Sherrytoldmeafewminutesago.Oh,Sherry.Sheissuchagossip.Iwouldn’tbelieveanythingshesays.No,really.ThistimeIthinkwecantrusther.Idon’tthinkshe’smakingitup.Wow,thisisnews.Whatabouttheirbaby?Idon’tknow.Ihaven’theardanythingaboutthat.Well,that’stoobad.EventhoughIdon’tlikeeitheroneofthem,Ifeelsorryforthem.It’ssobadwhenthishappensespeciallyforthechild.Yeah,right.It’seasytofallforthegossipandforgettothinkabouttheseriousconsequences.Still,Ican’tsensesurprised.Canyouimaginelivingwithsomeonelikethat?No,Ican’t.Sheissoself-center.Andwhatabouthim?Idon’tknowhimwellbutheseemsnice.Ithinksotoo.I’mnotsurehowheeverfeltforher.AreyoukiddingHormones(荷尔蒙),Youhadtoadmitthatsheisphysicallyattractive.Heprobablycouldn’thelphimself.Andnowheseemstohavefellinlovewithsomeoneelse.Iguesshecan’tcontrolhimself.I’veheardhehadadrinkingproblemtoo.Oh,Iwasn’tawareofthat.Well,what’snew,rightSomething’sneverchanged.That’sforsure.Hey,whataboutlunchNo,thanks.I’dbettertogetbacktowork.L5Unit1-3ListeningEmma’sbestisasmallbutgrowinghealthfoodcompany.Itwasstartedin1995,byamarriagecouplewhoweretiredofworkingforlargecompanies.ThetwofounderswereEdandEmmasmith,bothhealth-consciousvegetarians.Despitetherisks,Ed,Emmawantedtostarttheirownbusiness.Heknewitwouldbehardworkbuttheyweredeterminedtotry.Theirplanwastocreateabusinessthatprovidedhealthyfoodtobusypeople.Theywantedtheycouldbesomethingtheycouldbeproudof.Whentheystartedtheirbusiness,organicfoodwasbecomingmorepopular.Peoplewerebecomingmorefood-consciousandworriedaboutfoodsafety.Infact,peoplewerewillingtopayhigherpricesforfoodthatwasfreeofharmfulchemicals.Inaddition,anincreasingnumberofpeoplehavelittletimetogoshoppingandcookathome.Theywantedthemealsthatwerehealthybuteasytoprepare.Therewereveryfewfrozenmealsavailableatthetimeandnoneofthemwerevegetarianororganic.Therewasagapinthemarket.EdandEmmaimmediatelysawtheopportunityandlaunchedtheirfirstproduct.Itwasafrozenpastameal(速冻面食餐)withamixofvegetableanddeliciouscreamsauce.Themarketrespondedwithenthusiasticandprofitablebeyondexpectation.Theirproductwasaninstantsuccess.Totheirsurprise,itwassoonbeingeatenbymillionsofpeople,notonlyforvegetarianswhowereinterestedinorganicfoods.Itwasbeingbroughtbecauseitwaseasytoprepareandittastedgood.Andofcourse,itwashealthy.Otherproductsfollowedinrapidsuccession.Asaresult,attheendof5years,thecompanywasproducingover100frozenmeals.Sincethen,theyhaveincreasedthenumberofmealsover150,includingpizzas,sandwichesandsnacks.TheirfoodsarecarriedbynaturalfoodstoresandsupermarketsthroughoutNorthAmerica.Althoughtheyhadexpandedtheirproductionfacilitiesandincreasedthenumberofemployees,theyhadremainedthepreviouscompany.Theyenjoyedthefactthatthetheyarefamily-ownedbusiness,sensitivetotheneedsoftheircustomers.Theydon’thavetoworryaboutpleasingshareholders.Ratherthanpayingdividendtotheshareholders,Emma’sbesthasaperfectsharingplantobenefitsitsemployees.Bonusesandsalaryincreaseskeepemployeeshappyandmotivatethemtoworkhard.Asaresult,employerturnoverislowandthecompanyhasbeenrecognizedasoneofthebestcompaniestoworkfor.Inaddition,Emma’sbestsupportslocalcharities,especiallythosethatprovidehealthfoodstochildrenfromlow-incomefamilies.Givenitssuccess,thecompanyfeelsanobligationtocontributetosociety.Inspiteofthefactthatothercompanynowproducesimilarproducts,Emma’sbestremainsthemarketleader.Theirtotallycommitmenttoqualityhasmadethedifferenceandtheyareproudoftheiraccomplishments.L5Unit1-3vocabularyPeopleareoftennervousorapprehensivebeforeperforminginfrontofanaudience.Peoplewhoarereallynervousmayfeeltensewhichistheoppositeoftherelaxed.Someonewhostronglybelievesintheirabilitytodosomethingisoftenconfident.Thebestwayofbuildconfidenceistopracticewhatyou’regoingtodountilyoucandoitwithease.Tobeindifferentmeanstonotcareonewayortheotheraboutsomething.Ifyouareindifferenttoapersonorproject,itmeansthatthepersonorprojectisn’timportanttoyou.Tobeappreciativeistobethankfulorgratefulforsomething.Ifsomeonedoessomethingniceforyou,youshouldappreciateit.Tobedepressedistheoppositeoftobehappy.Whensomeoneisdepressed,theyfeelverysad.Aggressivepeopleoftenpushtheironlyideasortrytoforceothersfollowthem.Someonewhoispassivewillusuallynotresistthatofothers.Anoptimisticpersonbelievesinapositivefuture.Optimistsseeaglassofhalffullratherthanhalfempty.Theoppositeofanoptimistisapessimist.Sensitivepeopleareemotionalandhavestrongfeelingsaboutthings.It’simportanttobecarefulwhendealingwithsensitivepeoplebecauseit’seasytoupsetthem.Insensitivepeopledon’tseemtobeawareoforcareaboutthefeelingofothers.Ameanpersondoesn’ttreatotherpeoplewellorwithkindness.Meanpeopleoftenenjoymakingpeoplesufferfortheirmistakes.Tobekindistheoppositeoftobemean.Conceited(自负的)peoplehaveveryhighopinionofthemselves.Theyoftentalkabouthowgreattheyareandtendtoexaggeratetheirstrengths.Modestpeopledon’tshowofftheirstrengthsbutthey’reoftenverygoodatwhattheydo.L5Unit1-3dialogueAceindustry,mayIhelpyouThisisSueMitchellspeaking.Hi,Sue,thisisBenWongofJoblink.Oh,hi,Ben,howareyouI’vebeenexpectingyourcall.I’msorrytobelate.I’vebeentraveling.Itseemslikeeveryoneistravelingthesedays.That’sforsure.I’mawaymorethanI’mhere.Anyway,I’mcallingtoseeifwecanarrangeameeting.Good,therewereseveralmattersI’dliketodiscusswithyou.Sure,willlaterthisweekbepossible?Letmesee.Accordingtomyschedule,I’llhavesomethingThursdayafternoonandFridaymorning.Howlongdoyouthinkwewillneed?Ithinkanhourshouldbeenough.Thatshouldbefine.WouldThursdayat3:30workforyou?Yes,that’sfine.Ok,I’mlookingforwardtoseeingyouat3:30atThursday.Right,seeyouthenandthanks.Youarewelcome,Ben.Takecare.Hi,sue,I’msorrybutsomethingurgehascomeupsoI’dliketochangethetimeforourmeetingonThursday.Oh,I’msorrytohearthat.WhataboutFridaymorning?Thatshouldwork.Howearly?I’musuallyhereby9o’clock.CouldyoubeherebythenYes,thatshouldn’tbeaproblem.Ok,Fridayat9o’clock.Onceagain,sorryforthelastminutechange.L5Unit1-4ListeningTherearemanymysteriesinnature.Mysteriesarethingswedon’tunderstand,suchashowtheEgyptianpyramidswerebuilt.Infact,wearesurroundedbymysteries.Whatweknowabouttheworld,seemslikeverylittle.Scientiststellusthatwhatweseeintheuniverseisonlyasmallpartofwhatisthere.Therestisinvisible,includingdarkmatteranddarkenergy.Thesetwounknownsmadeuparound95%oftheuniverse.Evidencefortheirexistencecomesfromtheireffectsonwhatwecanobserve,suchasthemotionandpositionsofthedistantgalaxies.Yetthoughtweknowverylittle,weareabletobuildairplanesandcommunicatewithsmartphones.Insomeways,wehumansareverysmartoratleastwethinkweare.Westillneedtofacebigissues,likeclimatechangeandthat’sgoingtobeahugechallenge.Thechallengeforhumanswillbeourabilitiestoadapttoourchangingenvironment.WhataboutotherformoflifeHowdotheyadaptSeasonalvariations,forexample,canbeoneofthegreatestchallengesforanimalstoovercome.Overcomingsuchchallengeswillbeagreatachievementbuthardlyeasy.Somebirdsmigratethousandsofkilometerseachyear,todealwithseasonalchanges.Thesemigrationsareamazing.Birdsdon’tcarrymapsorcompasses,yettheyknowwheretogo.Theyhaddevelopedtheirabilitiestoseetheearthmagneticfield.Thisabilityisawonderofnature.Ittakesadvantageofthefactthattheearthislikeahugebarmagnet.Ithasnorthpolar,whichispositiveandsouthpolar,whichisnegative.Somehowthebirdsareabletoseethismagneticfieldanduseittotheiradvantage.Andeventhewaybirdsflytogetherisamazing.manymigratingbirdsflyinaVformation.Theydothistoconserveenergy.InaVformation,birdscanusetheenergyofthebirdsinfrontofthem.Thisenergycomesfromtheaircurrents,generatedbythewings.Conservingenergyisnecessaryforthebirdstosurviveinlongjourney.howdothebirdsknowthisIt’strulyamazinghowthebirdsknowthis.AnotheramazingexampleofsurviveanimalistheSalmon.Salmonspentmostoftheirlivesintheoceanwhichissaltwater.Yet,whenit’stimetobreed,theydosoinfreshwaterrivers.Salmoncanadapttheirbodiestosurviveinbothsaltwaterandfreshwater.Whenit’sbreedingtime,theyreturnedtothesameriverwheretheywereborn.Itseemsasiftheyhadbuilt-inmapthatguidesthemforhundredsofmiles.Oncetheyleftthesaltwater,theydon’teat.Theyaredeterminedtofinishtheirjourneydespiteofmanyobstacles.Theyswimagainststrongcurrents,jumpoverwaterfallsandtrytoescapeclawsofhungrybears.Manydiealongthewaybutenoughofthemsurvivetobreedandreproducethenextgeneration.Oncetheyhadlaytheireggs,theydie,havingcompletedtheirjourney.Itseemsthattheirpurposeinlifeisjusttoreproduce.Migrationtakestheanimalstonew,morefavorableenvironmentswhenseasonschange.Someofthesejourneysarelonganddangerous,alongrouteswithnoobviouslandmarks.Thelongestmigrationisthatoftheartictern.Itfliesfrompolartopolar,twiceayear.Ifaternachievesitsaveragelifespanof20years,thedistanceithasflownwillbeequivalenttoajourneytothemoonandback.Humansalsomigrate,butseldomifeverforseasonalvariations.unfortunately,humanmigrationsareoftenduetohumanactivities.Sincethebeginningofthe21stcentury,largescalemigrationshadbecomeaglobalproblem.Millionsofmigrantshavehadtoleavetheircountriesandlookfornewhomes.Manyhavediedalongthewayorlefttheserefugeesincampsuntiltheyareadmittedintoanewcountry.So,thequestionremainsastohowourglobalcommunitieswillfacethesechallenges.L5Unit1-4vocabularyTocriticizesomeoneistopointouttheirfalseormistakes.Somepeopleappreciateconstructivecriticism,whichcanhelpthemdeveloptheirskills.Topraisesomeoneistoletthemknowtheyhavedoneagreatjob.Somepeopleexpectedtobepraisedwhentheyperformwell.Toapologizetosomeoneistoadmitthatyouhavedonesom