1、word1Shumeihasmanypen-friendsaroundtheworld.Shelikeswritingtothemandreceivingtheirlettersinreturn.Shestatedwritingtoherfirstpen-friend,ThomasWrightfromBritain,whenshewastenyearsold.Theyhavebeenwritingtoeachotherfortwoyearsnow.Shumeienjoyswritingtopeoplefromothercountiesbecauseshefindsitveryinterestingtolearnmoreaboutthosecountiesandthedifferentthings.Shehopestovisitherpen-friendssomeday,butshewillcontinuewritingto
4、backfromtheshops,saidMrs.James.“Hewantedtobuysomenewfootballboots,buthewasntabletofindanythatwererightforhim.“WeretheyallthesameIasked.“Hesaidtheyshowedhimdifferentpairsbuthedidntlikeanyofthem.“WhatisPetergoingtodoabouthisboots,thenIasked.“Well,theshoptoldhimtoebackthenextweek.Itsoutabigproblembecausehedoesntneedtohavethembeforethenewschoolterm.Buthealwaysbeginstogethisthingsreadyearly.Forexample,he
6、ferent.Somemaybeloud.Somearehigh;othersarelow.Somesoundsareuseful.Withoutsoundwecannottalkorlistentooneanother.Theringingofthealarmclockwakespeopleup.Thehootingofacarwarnspeopleofdanger.Somesoundsareharmful.Whenplanesflylowovertheland,theveryloudsoundscandamagethehouses.Veryloudsoundscanevenmakepeopledeaf.Weknowsoundtravelaboutonekilometerinthreeseconds.Inathunderstormyouseethelightningfirstandthenhearthe
7、thunder.Thisisbecauselighttravelsmuchfasterthansound.Nexttimeyouseelightning;countthenumberofsecondsbeforeyouhearthethunder.Dividethisnumberofsecondsbeforeyouhearthunder.Dividethisnumberby3.Thiswilltellyouhowmanykilometersawaythethunderstormis.这个世界充满了许多有趣的声音。对于我们的耳朵而言，有些是不舒适的，有些如此是悦耳动听的。在一天之内你可能听到数以百计的不同声音。所有的声音是不同的。有些可能是响亮的。有些高的，有些低的。有些声音是有用的。没有声音，我们彼此不能听说。闹钟铃声唤醒人们。汽车的啼声警示处于危险状况的人们。有些声音是有害的。当飞机在陆地上方低空飞行，巨大的声音可能会损坏房屋。巨大的声音，甚至可以使人耳聋。我们知道，3秒钟里声音
8、传播约1公里。在雷雨天你先看到闪电，然后再听到雷声。这是因为光的速度比声音的速度传播得快的多。下次看到闪电，在听到雷声之前，你计算闪电秒数。均分听到雷声之前的秒数，即除以3。这会告诉你多少公里外有雷雨风暴。5Tommyhasalittledog.HernameisGoldier.Sheisprettyandinteresting.Tommylovesherverymuch.Theotherday,GoldierwasoutwalkingwithTommy.Shecutherpawonabitofglass.Whentheyarrivedhome,Tommysmotherthoughtthatthecutwasdeep.SheaskedTommytotakeGoldiertothevet.Thevetwasverykind,andhegaveheraninjection.Thenhestitchedupthecutandputona
9、bandage.Goldierlookseversofunnyasshewalksonthreelegs,holdingherpawasifshehasbeentowar!汤米有一只小狗。它名叫Goldier。它可爱而有趣。汤米很喜欢它。几天前，Goldier跟着汤米外出散步。它的爪子踩到了碎玻璃。当他们回到家里，汤米的母亲认为它的伤口深。她让汤米带Goldier去兽医那儿检查。兽医非常和气，他给Goldier打了针，然后缝合伤口并缠上绷带。Goldier只用三条腿走路，看上去太好笑了，它抬起伤爪子，好似是刚刚去过战场！6Longagopeopleusedbellsmorethantheydotoday.Thepostmanusedtoringahandwhenhedeliveredtheletters.Fireengineshadbellsinsteadofsirens.Peoplewhosoldthingscamepasthouses,ringingabellandshoutingwhatwasforsale.Everyvillagehaditschurchbelltoletpeopleknowitwastimetogotochurch.Atnight,thisbellwasrungsothattravelerwouldfindthevillageinthedark.Inmostcounties,bellswerehungaroundthenecksofan