高中英語高考沖刺語法專題2數(shù)詞介詞和介詞短語（學(xué)生版）

高中英語高考沖刺語法專題2：數(shù)詞、介詞和介詞短語【問題查找】Group1數(shù)詞一、單句語法填空1.TomythreesonsIleavemyseventeenhorses.Myeldestsonshalltakeahalf,mysecondsonshalltakea__________(three).2.It’sreportedthattheUnitedStatesuses__________(two)asmuchenergyasthewholeofEuropeeveryyear.3.Intheflood,abouttwomillionpeoplewereinjuredand___________(million)ofhousesfellintopieces.4.Inthesummerholidayfollowingmy____________(eighteen)birthday,Itookdrivinglessons.5.Wecansee___________(thousand)ofstarsatnightifitisfine.二、翻譯句子畢業(yè)晚會(huì)將于6月30日晚上19:30舉行。_________________________________________________________________投稿的截止日期為2024年2月1日。_________________________________________________________________Group2介詞與介詞短語一、單句語法填空1.Guangdongis__________thesouthofChina,anditis__________thenorthofHainan.2.Ihateitwhenshecallsmeatwork—I'malwaystoobusytocarry__________aconversationwithher.3.Studentsdon’tgotoschool__________Sundays.4.Itisamazingthatthelittleboycanswim____________therivermeasuring100meterswide.5.TheyencouragediscussionwithotherstudentsandhelpyoudevelopyourEnglish__________newandchallengingways.6.Modemmethodstrackingpolarbearpopulationshavebeenemployedonlysincethemid1980s,andareexpensivetoperformconsistentlyoveralargearea.7.Iwassearching__________thesethreewesternlowlandgorillasI’dbeenobserving.8.Thistrend,whichwasstartedbythemedicalmunity(醫(yī)學(xué)界)__________amethodoffightingheartdisease,hashadsomeunintendedsideeffects.9.Afterschoolsheplanstotakeayearofftomodelfulltimebeforegoingtouniversitytogetadegree__________engineeringorarchitecture.10.Butmyconnectionwithpandasgoesback__________mydaysonaTVshowinthemid1980s.11.Mostofusaremorefocused__________ourtasksinthemorningthanwearelaterintheday.12.ChopsticksarenotusedeverywhereinAsia.InIndia,forexample,mostpeopletraditionallyeat__________theirhands.13.Thereyouwillfindthemprepareddifferently—moredumplingandlesssoup,andthewrappersarepressed____________handratherthanrolled.14.Giantpandasalsoserve_____________anumbrellaspecies(物種),bringingprotectiontoahostofplantsandanimalsinthesouthwesternandnorthwesternpartsofChina.15.Theartistwasfinallyhumbled(謙卑)bythegreatestartist_____________earth,MotherNature.二、完形填空真題節(jié)選Ifinda____47(clean)____mountain,withtoiletsatcampsandalongthepaths.Theenvironmentalchallengesare____48(significant)____buttheeffortsmadebytheTanzaniaNationalParkAuthorityseemtobe____49____.ThebestofaKilimanjaro____50____,inmyopinion,isn’treachingthetop.Mountainsare____51____asspiritualplacesbymanycultures.This____52____isespeciallyevidentonKilimanjaroas____53____gothroughfiveecosystems（生態(tài)系統(tǒng)）inthespaceofafewkilometers.Atthebaseisarainforest.Itendsabruptlyat3,000meters,____54____landsoflowgrowingplants.49.A.payingoff B.spreadingout C.blowingup D.fadingaway50.A.atmosphere B.experience C.experiment D.sight51.A.studied B.observed C.explored D.regarded52.A.view B.quality C.reason D.purpose53.A.scientists B.climbers C.locals D.officials54.A.holdingonto B.goingbackto C.livingupto D.givingwayto【要點(diǎn)精講】數(shù)詞學(xué)習(xí)目標(biāo)：能正確判定數(shù)詞，掌握數(shù)詞的用法并實(shí)際運(yùn)用于語法填空和書面表達(dá)中步驟一：基數(shù)詞與序數(shù)詞的寫法基數(shù)詞onesevennineteentwoeightthreeninetwentyonefourtensixteentwentytwofiveseventeenthirtysixeighteenninety序數(shù)詞firstsevenththirteenthnineteentheighthfourteenthninthfourthtenthsixteenthtwentysecondseventeenththirtiethsixthninetieth步驟二：基數(shù)詞和序數(shù)詞的用法①基數(shù)詞表數(shù)量。如：Thereareeightboatsinthelake.②序數(shù)詞表次序，翻譯成“第……”，序數(shù)詞前一般要與定冠詞或物主代詞連用。如：eg.

Tomistheirsecondson..Heisthefirstonetoehere.注意：序數(shù)詞有時(shí)可與不定冠詞連用，表示數(shù)量上“又—”,“再一”eg：Hetriedasecondtime.他又試了—次。Shalllaskhimathirdtime?

還要我再問他—次嗎?（我已問了他兩次）步驟三：數(shù)詞的拓展用法（1）hundred,thousand,million,billion,dozen的用法有數(shù)字沒s：5hundredtrees,2dozenapples,6billionpopulation有s有of：dozensofeggs,hundredsofstudents,manythousandsofsoldiers（2）編號(hào)的表示方法 第二課.LessonTwo=Lesson2=2路公交車 BusNo.2=206房 Room206（3）時(shí)間的表示方法順讀法6：25sixtwentyfive 9：48逆讀法①分鐘數(shù)≦30用past(超過) 7：23②分鐘數(shù)﹥30用to(還差) 8：50半小時(shí)與一刻鐘：half,quarter2：30halfpasttwo 6：45持續(xù)時(shí)間表達(dá) 一個(gè)半小時(shí)onehourandahalf= Themeetinglastonehourandahalf. Shehaswaitedforabusforoneandahalfhours.（4）年、月、日、世紀(jì)、年代的表示方法月份一覽表某年某月： 2017年12月 December2017某月某日：12月10日 December10=Decemberthetenth=thetenthofDecember某年某月某日：2017年12月10日 December10,2017世紀(jì)、年代：19世紀(jì)inthenineteenthcentury80年代intheeighties20世紀(jì)70年代inthe1970s(1970’s)（5）分?jǐn)?shù)與小數(shù)的表示方法分?jǐn)?shù)：分子用基數(shù)詞，分母用序數(shù)詞，分子大于1，分母加s。1/4 onefourth 3/4 小數(shù)與百分?jǐn)?shù)：小數(shù)點(diǎn)讀成point，百分號(hào)讀成percent。5.68 fivepointsixeight 30% thirtypercent分?jǐn)?shù)、小數(shù)與名詞連用。5/6的作業(yè)fivesixthsofthehomework60%的工人1.8個(gè)蘋果（6）倍數(shù)表示法

1).

主語+謂語+倍數(shù)(或分?jǐn)?shù))+as+adj.+asIhavethreetimesasmanyasyou.我有你三倍那么多。2).

主語+謂語+倍數(shù)(分?jǐn)?shù))+thesize(amount，length…)of…Theearthis49timesthesizeofthemoon.地球是月球的49倍。3).

主語+謂語+倍數(shù)(分?jǐn)?shù))+

形容詞(副詞)比較級(jí)+than…Thegrainoutputis8percenthigherthisyearthanthatoflastyear.今年比去年糧食產(chǎn)量增加8%。4).

還可以用by+倍數(shù)，表示增加多少倍Theproductionofgrainhasbeenincreasedbyfourtimesthisyear.今年糧食產(chǎn)量增加了4倍（7）度量衡的表示方法1厘米1centimeter 2英寸2inches 100米100meters6公里6kilometers 3英尺3feet 8碼8yards4公斤4kilograms 5磅5pounds 7噸seventons9米深9metersdeep .3米寬3meterswide 2米長2cmeterslong（8）含數(shù)詞的短語attheageof+基數(shù)詞：在……歲時(shí)Hewentabroadattheageof18.inone’s+基數(shù)詞復(fù)數(shù) Hestartedapanyinhisfifties.帶有數(shù)詞的名詞作定語的表達(dá) asevenyearoldboy aahundredmeterrace atenminutewalk=10minutes’walk介詞學(xué)習(xí)目標(biāo)：學(xué)生能正確判定介詞，掌握介詞的用法并實(shí)際運(yùn)用于語法填空中步驟一：介詞的定義與語法功能介詞是一種虛詞，來表示詞與詞、詞與句之間的關(guān)系的詞。在句中不能單獨(dú)作成分。介詞構(gòu)成的介詞詞組，在句中作狀語，表語，補(bǔ)語。又能與動(dòng)詞，be+形容詞組合構(gòu)成謂語。如：We’llgotoschoolintwoweeks.（作狀語）ThemanwithlonghairismyEnglishteacher.（作定語）Thestudentsareunderthetree.（作表語）Hefoundthegirlontheplayground.（作賓補(bǔ)）Heisinterestedintennis.

（系表結(jié)構(gòu)作謂語）SheturnedontheTV.（動(dòng)詞短語作謂語)步驟二：各類介詞的區(qū)別用法1.方位介詞in,on,to的區(qū)別用法in表示包含GuangdongisinthesouthofChina.on表示接壤GuangdongisontheeastofGuangxi.to表示相隔GuangdongistothesouthofBeijing.2.方位介詞across,through,over的區(qū)別用法across指從表面穿過，如過馬路、過橋等。Youmustbecarefulwhenyougoacrosstheroad.through指從內(nèi)部穿過，如穿過森林、門窗等。Therivergoesthroughourvillage.over指從上面越過，如越過圍墻、欄桿等。Shecanjumpoverthehurdle(跨欄).inthewall和onthewall以及inthetree和onthetree的區(qū)別用法inthewall指在墻壁里Thereisaholeinthewall.onthewall指在墻壁表面Thereisapictureonthewall.inthetree指樹上的外來物Thereisabirdinthetree.onthetree指樹自身生長的東西Therearemanyapplesonthetree.infrontof和inthefrontof的區(qū)別用法infrontof反義：behindAnoldladyisstandinginfrontofthecar.inthefrontof反義：atthebackofAnoldmanisdriving,sittinginthefrontofthecar.方位介詞above,below和over,under和on的區(qū)別用法above反義：belowThereisalightabovethetable.Manyflowersarebelowthewindows.僅表示位置上“高于”或“低于”，不表示垂直關(guān)系。over反義：underThereisastonebridgeovertheriver.Thereisababycatunderthetable.表示垂直上下關(guān)系on表示在某物體上面并與之接觸Heputhiswatchonthedesk.介詞among和between的區(qū)別用法among（三者或以上）之間Heisthemosthumorousfriendamongthesetenmen.between（兩者）之間Don’tsitbetweenthetwochairs.時(shí)間介詞in,on,at的區(qū)別用法in+較長的時(shí)間in2016/summer/Julyon+具體的某一天onSunday/August6th/Children’sDay/acoldnightat+點(diǎn)鐘atteno’clock時(shí)間介詞since,for+完成時(shí)的區(qū)別用法since+時(shí)間點(diǎn)/句子Ihaveknownhimsince2016IhaveknownhimsinceIwasachild.for+一段時(shí)間Ihaveknownhimfor5years.時(shí)間介詞after/in(+一段時(shí)間)的區(qū)別用法after+一般過去時(shí)Hecameafter3days.in+一般將來時(shí)Hewillein3days.介詞except,exceptforbesides,but,apartfrom(表“除了”)的區(qū)別用法except表示減的概念，表示“除了”AllthestudentscameexceptTom.exceptfor表示減的概念，表示“除了”，但except前后兩名詞屬于同類名詞，exceptfor前后兩名詞屬于不同類名詞，多表明理由細(xì)節(jié)Yourpositionisgoodexceptforafewspellingmistakes.besides表示加的概念，表示“除了……還有”Thebossstillneeds3menbesidesTom.but表示“除了”，與no,notany,all等詞連用時(shí)為介詞，后面的動(dòng)詞用不定式，如果but前面有實(shí)義動(dòng)詞do的任何形式，則but后面用動(dòng)詞原形。否則，就用不定式形式。Ihavenochoicebuttowait.Icandonothingbutwait.apartfrom在不同的上下文中，既有besides的含義，又有except和exceptfor的含義，要根據(jù)上下文來判別①Apartfrom/BesidesEnglish,hehasagoodmandofRussianandFrench.②Hehasnointerests,apartfrom/excepthiswork.③It’sagoodpaper,apartfrom/exceptforafewspellingmistakes.介詞in,with,by(表“使用”)的區(qū)別用法in+語言/顏色等CanyoutranslatethissentenceinEnglish.with+冠詞/代詞+具體的手段或工具Youcanwritedownwiththispen.by+具體的手段或工具byhand;byletter;bypost;bymeans/waysof介詞by,in,on(+交通工具)的區(qū)別用法by直接+交通工具bybusin/on需加冠詞(be)inacar=takeacar介詞as和like的區(qū)別用法as作為Asateacher,hecaresforthesechildren.like像Hecaresforthesechildrenliketheirfather.介詞against的用法against逆著、迎著(方向)Werunagainstthewind.反對(duì)Hewasactiveinpoliticsandwasstronglyagainstslavery.撞擊；碰著Hehitagainstthepolereadingashewaswalking.靠著Heputtheladderagainstthewall.和……對(duì)照/對(duì)比；以……為背景Redflagsstandoutbrightlyagainstthebluesky.防備defendagainstenemy;protestagainstrain原因介詞的區(qū)別用法for常與sorry,famous,punish,praise,thank,blame等詞連用IamsorryforwhatIsaidtoyou.at表示引起某種情感變化的原因，常與表示看、聽或喜、怒、吃驚的詞連用，意為“因聽到或看到……而……”Hewassurprisedatthenews.from常接抽象名詞表示自然、間接或外在的原因，如受傷、車禍等。Hediedfromthewound.of多用于表示自身或內(nèi)在的原因，如病、餓等Theoldmandiedofhunger.with指生理上或情感上由外界到內(nèi)心的原因Hearingthenews,hejumpedwithjoy.Hewasshakingwithanger.by表示外部的，尤其是暴力的或無意中造成某種結(jié)果的原因Shetookyourumbrellabymistake.over一般用于cry,weep,laugh等帶有感情色彩的動(dòng)詞后，表示所發(fā)生的事情的原因Sheweptoverthedeathofherdaughter.Welaughedoverthevictory.becauseof表示引起結(jié)果的直接原因Heretiredlastmonthbecauseofhisillness.thanksto表示引起某種幸運(yùn)結(jié)果的原因，常意為“幸虧……，多虧……”ThankstoJohn,wewonthegame.計(jì)量介詞的區(qū)別用法at表示“以……速度；以……價(jià)格”Itfliesatabout900kilometersanhour.Isoldmycaratahighprice.for表示“用……交換；以……為代價(jià)”。注意：at表示單價(jià)，for表示總錢數(shù)。Hesoldhiscarfor500dollars.by表示“以……計(jì)”，后跟度量單位。注意：by后接具體度量單位要加the。Theypaidhimbythemonth.介詞在短語搭配中的應(yīng)用高考主要考查學(xué)生對(duì)固定短語的掌握程度、對(duì)短語意義的了解以及介詞在這些固定搭配中的應(yīng)用。?？碱}型為：完形填空、語法填空。(1)動(dòng)詞詞組：如remindsb.ofsth.提醒某人某事；robsb.ofsth.搶劫某人的……；resultfrom由……引起；callat訪問(某地)(2)形容詞詞組：如becuriousabout對(duì)……好奇；beproudof因……而自豪；bepopularwith受到……的歡迎(3)介詞短語：如apartfrom除……之外；inadditionto除……之外(還)；becauseof因?yàn)?；insteadof代替；infearof為……提心吊膽；forfearof以免；incaseof防備，萬一；thanksto由于；inthemiddleof在……中間accordingto根據(jù)；infrontof在……前面；inreturnfor作為對(duì)……的回報(bào)；inchargeof負(fù)責(zé)；asaresultof作為……的結(jié)果；inexchangefor與……交換等?！静槁┭a(bǔ)缺】Group1數(shù)詞一、單句語法填空1.Tom,atwelveyearoldboy,canspeakEnglishquitewell.Hewantstolearna_________(two)language.2.ThisSaturdayismy___________________(nineteen)birthday.Weletomyparty!3.Therewere____________(hundred)ofpeopleontheshipatthattime.4.Themuseumwasbuiltinthe______________(seventeen)century.5.Johnsetupapanyinhis______________(twenty).6.____________(million)ofteenagersareadmittedtouniversityeveryyear.二、翻譯句子1.英語口語競賽將于3月11日上午9點(diǎn)舉行。______________________________________________________________________________2.暑假是寒假的兩倍長。______________________________________________________________________________\3.龍舟賽將于5月23日下午3點(diǎn)舉行。______________________________________________________________________________4.這條鐵路比那條鐵路長3倍。______________________________________________________________________________Group2介詞與介詞短語一、單句語法填空1.Mostofusaremorefocused________ourtasksinthemorningthanwearelaterintheday.2.Allausuallygoestowork_______hercar,buttodayshegoesthere_______taxibecausehercarwasbroken.3.Hehasbeenhere_______2014.Inanotherword,hehasbeenhere_______4years.4.Tomsits_______thefrontoftheclassroomwhileJohnsits_______thebackofit.5.Thereisahole_______thefrontwallandthereisapicture_______thebackwall.二、完形填空真題節(jié)選1.It’sabout250milesfromthehillsofwestcentrallowatoEhlers’homeinMinnesota.Duringthelongtriphome,followingaweekendofhunting.Ehlers____41____aboutthesmalldoghehadseen____42____alongsidetheroad.Hehad____43____tocoax（哄）thedogtohimbut,frightened,ithad____44____.41.A.read B.forgot C.thought D.heard42.A.read B.trembling C.eating D.sleeping43.A.tried B.agreed C.promised D.regretted44.A.calmeddown B.stoodup C.rolledover D.runoff2.Windowsanddoorshave_____53(important)_____metaphorical(比喻)meanings.I’mtellingthemtheycan’topenwhattheyabsolutelyknowisadoor.Whatiflaterin_____54(life)_____theyetoametaphoricaldoor,likeanopportunity(機(jī)會(huì))ofsomesort,and_____55_____openingthedoorandtakingtheopportunity,theyjust_____56_____itandwonder,“Whatifitisn’tadoor?”Thatis,“Whatifitisn’ta_____57_____opportunity?”55.A.byparisonwith B.inadditionto C.regardlessof D.insteadof56.A.getholdof B.stareat C.knockon D.makeuseof57.A.real B.typical C.similar D.limited3.Asreportedbyalocalnewspaper,Baileywasmorethantwothirdsofthewaythroughher____44(race)____whenarunnerinfrontofherbegancryinginpain.She____45____tohelpherfellowrunner,DanielleLenoue.Baileytookherarmtoseeifshecouldwalkforwardwith____46____.Shecouldn’t.Baileythen____47____toletLenoueclimbontoherbackandcarriedherallthewaytothefinishline,thenanother300feettowhereLenouecouldget____48____attention.45.A.agreed B.returned C.stopped D.promised46.A.courage B.aid C.patience D.advice47.A.wentaway B.stoodup C.steppedaside D.bentdown48.A.medical B.public C.constant D.equal【梳理優(yōu)化】數(shù)詞A.補(bǔ)充、完善初步總結(jié)的解題方法。一、?？碱}型：1.聽說2.語法填空3.書面表達(dá)二、解題技巧語法填空題中數(shù)詞的解題技巧1.判斷所給單詞是否是數(shù)詞（一般是給出提示詞的）；2.根據(jù)題目運(yùn)用基數(shù)詞或者序數(shù)詞。介詞和介詞短語A.補(bǔ)充、完善初步總結(jié)的解題方法。一、?？碱}型：1.完型填空2.語法填空題二、解題技巧語法填空題中介詞和介詞短語的解題技巧觀察空格處是否給出提示詞（一般是未給出提示詞的）；觀察空格處前后是否有構(gòu)成搭配短語或者表時(shí)間、地點(diǎn)、原因、方式等；判斷是否需要填入介詞；根據(jù)題意和所學(xué)知識(shí)填入恰當(dāng)?shù)慕樵~小竅門：口訣1:

年月周前要用in,

日子前面卻不行。遇到幾號(hào)要用on，上午下午又是in。

要說某日上下午，

用on換in才能行。黎明午夜黃昏要用at，時(shí)分前用它也不錯(cuò)?？谠E2:

in在……里，

out在……外，在旁邊的是beside，靠近的為by。

on在……上，under在……下，above在上頭,

below在底下?？谠E3:

this,that,next,last,one,

接年、月、季、星期、周，介詞省略已習(xí)慣。

over,under正上下，above,below則不然，

besides,except分內(nèi)外，among之內(nèi)along沿。

before能接完成時(shí)，ago過去極有限。since以來during間，since時(shí)態(tài)多變換。

【強(qiáng)化鞏固】單句語法填空Group1數(shù)詞—Whichmonthoftheyeardoyoulike?

.—July,the_____________monthbecausesummervacationbeginsinthismonth.Asaresultofthefarmers’hardworking,theyharvestedthewheatthisyear________(third)timesasmuchastheydidtheyearbefore.Shegraduatedfromuniversityattheageof______________(twentyfirst).ShegotmarriedwithTominher_____________(thirty).Pleasegivemea___________(two)chance.Group2介詞和介詞短語1.JackhasstudiedChineseinthisschool_______theyearof2000.2.Aseriousstudyofphysicsisimpossiblesomeknowledgeofmathematics.3.Thereisnothinginourbedroom_______anewbed.4.Ihaveafewotherfriends______________you.5.Doeshealwaysgotowork_______bikeor______foot?6.Kelly,who’sthegirl_______glassesinthephoto?It’sme.Iusedtowearglassesandhavelonghair.【課后練習(xí)】Group1數(shù)詞翻譯句子1.我的爺爺在八十多歲時(shí)去世了。_______________________________________________________________________李華總是第一個(gè)完成作業(yè)。_______________________________________________________________________飯后散步10分鐘有助于我們的健康。_______________________________________________________________________Group2介詞和介詞短語單句語法填空1.Ourteachersarenotonlystrict_______theirwork,butalsostrict_______theirstudents.2.Mr.Brownsatback_______asmile_______hisface.3.Maryfoundasmallbag_______theground_______thewaytoschool.4.Thefieldwasfull_______sheepandtheywerelying_______theground.5.Marywasangry_______Katewholaughed_______her.6.Swimmingisgood_______ourhealth,but_______thesametimewemustn’tforgetthedanger.二、語法填空Thegiantpanda

isloved1___________peoplethroughouttheworld.Chinesescientists2_______________

(recent)hadachancetostudyawildfemalepanda3___________anewbornbaby.Shewasaverycaringmother.For4_______________(twentyfifth)days,sheneverleftherbaby,noteventofindsomethingtoeat!Shewouldnotletanyotherpandasenear.Shelickedthebabyconstantlytokeepitclean.Anysmellmightattractdangerous5_______________(animal)thatwouldtrytoeatthelittlefortingpats.Themotherheldthebabyinherfrontpawsmuchthewayahumandoes.

6____________

itcried,sherockeditbackandforthandgaveitlittlefortingpats.Themothercontinuedtocarefortheyoungpanda

7_________morethantwoyears.Bythattime,thepandanolongerneeded

8______(it)motherforfood.However,itstayedwithherandlearnedaboutthewaysoftheforest.Then,aftertwoandahalfyears,themother9___________(drive)theyoungpandaaway.Itwastimeforhertohaveanewbaby,10_____________

itwasalsotimefortheyoungpandatobeindependent.三、閱讀理解Rainforestsarehometoarichvarietyofmedicinalplants,food,birdsandanimals.Canyoubelievethatasinglebush（灌木叢）intheAmazonmayhavemorespeciesofantsthanthewholeofBritain!About480varietiesoftreesmaybefoundinjustonehectareofrainforest.Rainforestsarethelungsoftheplanetstoringvastquantitiesofcarbondioxideandproducingasignificantamountoftheworld'soxygen.Rainforestshavetheirownperfectsystemforensuringtheirownsurvival;thetalltreesmakeacanopy（樹冠層）ofbranchesandleaveswhichprotectthemselves,smallerplants,andtheforestanimalsfromheavyrain,intensedryheatfromthesunandstrongwinds.Amazingly,thetreesgrowinsuchawaythattheirleavesandbranches,althoughclosetogether,neveractuallytouchthoseofanothertree.Scientiststhinkthisistheplants'waytopreventthespreadofanytreediseasesandmakelifemoredifficultforleafeatinginsectslikecaterpillars.Tosurviveintheforest,animalsmustclimb,jumporflyacrossthegaps.Thegroundflooroftheforestisnotalltangledleavesandbushes,likeinfilms,butisactuallyfairlyclear.Itiswheredeadleavesturnintofoodforthetreesandotherforestlife.Theyarenotcalledrainforestsfornothing!Rainforestscangenerate75%oftheirownrain.Atleast80inchesofrainayearisnormalandinsomeareastheremaybeasmuchas430inchesofrainannually.Thisisrealrainyourumbrellamayprotectyouinashower,butitwon'tkeepyoudryifthereisafullrainstorm.Injusttwohours,streamscanrisetentotwentyfeet.Thehumidity（濕氣）oflargerainforestscontributestotheformationofraincloudsthatmaytraveltoothercountriesinneedofrain.12.Whatcanwelearnaboutrainforestsfromthefirstparagraph?A.Theyproduceoxygen. B.Theycoveravastarea.C.Theyarewellmanaged. D.Theyarerichinwildlife.13.Whichofthefollowingcontributesmosttothesurvivalofrainforests?A.Heavyrains B.Bigtrees.C.Smallplants. D.Forestanimals.14.Whydotheleavesandbranchesofdifferenttreesavoidtouchingeachother?A.Formoresunl