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UnitOneGoodcommunicationisthekeytosuccesswhenlearningonline.YoushouldtaketheopportunitytogettoknowyourteacherandclassmatesthroughemailandbyparticipatinginInternetdiscussions.Thiswillleadtoamorepositiveand(１rewarding)learningexperience.It'struethatlearningthetechnologyneededtotakepartinaclasscanattimesbe(2frustrating).Forexample,youmayneedtoaskhowto(3post)yourassignmentontheWeb.But,don'tworry!Ifyouhaveaproblem,askforhelp.There'snosuchthingasastupidquestion,sothereisnoneedtobeintimidatedor(４embarrassed).Sharing（５insights）andanswersfreelyiswhatmakestheInternetsuchagreatmediumforlearning.OnlineclassroomteacherMikeRobertswasaskedaboutwhathethoughtthegreatest（６benefit）ofonlinelearningis.Asateacher,IneedthestudentstoaskquestionssothatIknowwhatareasofmylessonsneedfurther（７explanation）.That'swhatisgreataboutteachingandlearningovertheInternet.Inanordinaryclassroom,timeislimited,sostudentsseemtoaskthe（８minimum）amountofquestionspossible.Butinthe（９virtual）classroom,studentsarealwaysaskingquestions.Theyreallyseemtofeel（１０comfortable）askingmefortheinformationthattheyneed.Theyalsosharealotofvaluableideaswitheachotherinawaythatyoudon'tusuallyseeinaregularclassroom.interestedembarrassedfrustratingcommunicatecomfortablebenefitvaluablemediumpostexplanationvirtualdisciplinerewardingminimuminsightsUnitTwoIhavetowritetoyouaboutthewayyoudress.Iwasalittleintimidatedto(1comment)inperson,soIamwritinginstead.Ihopethisdoesn't(2upset)you,butsomethinghastobedone.Imust(3appeal)toyoutostartdressinglikeamom.Your(4unique)senseoffashionismorelikeasister'sthanamother's.Personally,it's(5embarrassing)tohaveamomwhodressesyoungerthanIdo.YouwearT-shirtswithtornjeansandyournoseispierced(6).Myfriendssayit'sstrange,butIthinkthey'rebeingalittletoo(7negative).It'smostlikelybecausetheirboyfriendsthinkyouarepretty.Still,ifyouwantmetohaveanyfriendsinthiscommunity,itisvitalthatyou(8remove)theringfromyournoseandstartdressingliketheothermoms.Don'tyourpeersevershowanyconcern?Don'tyourememberhowhorriblebeingateenagercanbe?Ifeel(9awful)becauseIthinkpeopleofmyagewouldrathertalktoyouthantome.Lastweekattheshoppingcenter,Ihadthe(10absolutely)worstexperienceofmylife.Theyoungmanwhotookourmoneyaskedifyouweremyoldersister.IthoughthewouldlikelyaskyououtifIhadn'tsaidThanks,momtoyou.Itwasdisgusting.disgustingsuddenlycommitoffensivechallengeUnitThreeSomepeoplejustcan'tkeepfromgiving.Thatwasthewayitwaswithmyneighbor.Despitebeingcrippled,shewasveryactive.Infact,sheseemedtodomoreforthe(1community)everydaythanIeverdoinayear'stime.Iwasalways(2amazed)atthepaceshekept.OnMondaysandFridays,sheworkedatacollegegivingstudents(3guidance)onwhatcareertochoose.OnTuesdaysandThursdaysshehelpedoutatachurchthatgave(4aid)topeoplewithouthomes.Andontheweekends,shetaughtlocalkidswhoneeded(5extra)helpwiththeirschoolwork.Andmostimportantly,shealwayshadapositive(6attitude).Idon'trememberoncehearinghercomplainabouthertroubles.Thestressesofeverydaylifeneverseemedto(7bother)her.Instead,shelookedforevery(8occasion)shecouldfindtospreadhergoodhumoraround.IrememberwhenIhadjustlostmyjob.Shetookadayofffromworktospendtimewithmeandlistentomytrifles.Sheneveroncebecameimpatientwithmy(9complaints).SheneveractedliketherewasanythinginthisworldmoreimportantthanwhatIhadtosay.WhatI(10regret)nowisnothavingeverreallydoneanythingforher.Isupposesheneverneededit.curiosityengagedtrendacceptanceenvyUnitFourSo,howaboutyourinterview?Thewholethingwasbadfromthebeginning.Ienteredtheroomwith(1confidence)andgavethewomanastronghandshake.ShesaidI(2squeezed)toohardandhurther.Ihadarealhardtime(3communicating)withherafterthat.Whatdoyoumean?Well,itwasprettyapparentthatIfailedto(4persuade)hertohireme.Itriedtomakeeye(5contact)withher,butshekeptlookingaway,whichmademethinkshewasn'tvery(6focused)orinterestedinwhatIwassaying.Iknowwhatyoumean.Itcanbesostressfulbeing(7interviewed)forajob.It'svery(8depressing)whenyoudon'tgetanyencouragementfromthepersonwhoisaskingyouquestions.But,don'tworry.I'msureyoumadeabetter(9impression)thanwhatyouthink.Idon'tthinkIimpressedheratall.Iwasreallybotheredthatshekeptlookingaway,only(10interrupting)meonceinawhiletothrowinawordortwo.Ihadtogetherattentionbymakingbiggesturesandchangingthetoneofmyvoice.Idon'tthinkIhaveeverhadsuchahorribleexperience.exchangeenableextendedcommittingrelaxedUnitFiveAIDShasemergedastheworld'sbiggestproblemoverthepast25years.The（1epidemic流行病）hastouchedthelivesofpeoplearoundtheworld,butnootherplacehasbeenplaguedlikeAfrica.InAfrica20millionpeoplewere（２infected）withthediseasein1999.Thatnumbercontinuestogrow.Africahas（３accounted）fornearlyfouroutoffiveAIDSrelateddeathsintheworld.Itis（４estimated估计）thatasof1999,13millionchildrenhadlosttheirparentstoAIDS.Althoughthereisnocure,peopleinmoredevelopedcountriescangetmedicinetohelp.InAfricathough,mostdonothave（５access）tonewmedicines.Mostpeopleneglectgoingtothedoctortofindoutiftheyhavethedisease.Becausetheyhavenotbeen（６diagnosed诊断）withtheillness,theycontinuetospreadthediseasewithoutknowingit.Manymenleavetheirruralhomestofindwork.This（７threatens危及）manypeopl