Unit1AnimalFriends第二課時（SectionA2a—2f）分層作業(yè)一、單詞拼寫1．Thestudentsoftenhave(三明治)forlunchonschooldays.【答案】sandwiches【詳解】句意：學生們在上學日經(jīng)常吃三明治午餐。根據(jù)漢語提示可知，sandwich“三明治”，這里用名詞復數(shù)形式sandwiches。故填sandwiches。2．Pleasetellhimthe(驚人的)news.Idon’tthinkhewillbelieveit.【答案】amazing【詳解】句意：請告訴他這個驚人的消息。我想他不會相信的。amazing驚人的，在句中作定語修飾news，故填amazing。3．TinaandLilaaregoodfriends.Theyoftenplay(在一起).【答案】together【詳解】句意：Tina和Lila是好朋友。她們經(jīng)常在一起玩。together意為“在一起”，是副詞，playtogether“一起玩”。故填together。4．Thisisanunluckybut(溫暖的)story.【答案】warm【詳解】句意：這是一個不幸但溫暖的故事。warm“溫暖的”，形容詞作定語，故填warm。5．Doyouknowhowto(保持)healthy?【答案】keep【詳解】句意：你知道如何保持健康嗎？keep“保持”，動詞，空處有不定式符號to，動詞用原形。故填keep。二、單項選擇6．Themaninacapattheschoolgateismydad.Which“a”makesadifferentsound?A．man B．cap C．gate D．dad【答案】C【詳解】句意：在學校門口戴帽子的那個人是我爸爸。哪個“a”的發(fā)音不同？考查語音。man/m?n/；cap/k?p/；gate/ɡe?t/；dad/d?d/。根據(jù)單詞讀音，可知選項C畫線讀音與其它不同。故選C。7．選出畫線部分所含元音音素不同的選項。A．have B．grandma C．China【答案】C【詳解】選出畫線部分所含元音音素不同的選項?？疾檎Z音。have/h?v/；grandma/?ɡr?nmɑ?/；China/?t?a?n?/。have和grandma畫線部分所含元音音素是/?/，China畫線部分所含元音音素是/?/。故選C。8．Whichofthefollowingunderlinedpartsisdifferentinpronunciation?A．paint B．explain C．Britain D．train【答案】C【詳解】句意：下列劃線部分發(fā)音哪一項與其他的不同？考查元音字母組合ai的發(fā)音。C選項中ai字母組合不發(fā)音，其他選項ai字母組合發(fā)音都是/ei/。故選C。9．What’sthetranscriptionoftheunderlinedpartintheword“Sunday”?A．/i/ B．/e/ C．/i:/ D．/ei/【答案】A【詳解】試題分析：根據(jù)題干分析，是要選出Sunday這個單詞中的劃線部分讀音，根據(jù)拼讀規(guī)則，畫線部分ay組合在這個單詞中發(fā)短音/i/，所以選A。考點:考查語音知識10．下列句子中下劃線單詞全部應該重讀的是________。A．Whattimedoyouusuallygetup? B．Soundslikeyou’rehavingagoodtime.C．Icansing,butIcan’tdance. D．I’mplayingbasketballwithsomefriendsatthepark.【答案】B【詳解】句意：下列句子中下劃線單詞全部應該重讀的是Soundslikeyou’rehavingagoodtime。考查句子的重讀。Whattimedoyouusuallygetup你通常幾點起床，you不用重讀；Soundslikeyou’rehavingagoodtime聽起來你玩得很開心，全部都要重讀；Icansing,butIcan’tdance我能唱歌，但我不會跳舞，but不用重讀；I’mplayingbasketballwithsomefriendsatthepark我和一些朋友在公園打籃球，I不用重讀。結合每個選項的分析，B選項的句子要全部重讀，故選B。11．Thereis________elephantinthezoo.________elephantisfromAfrica.A．a(chǎn);The B．a(chǎn)n;The C．a(chǎn)n;An D．a(chǎn);An【答案】B【詳解】句意：在動物園里有一頭大象。這頭大象來自非洲。考查冠詞用法。a/an一個，不定冠詞，表示泛指，a用于以輔音音素開頭的單詞前，an用于以元音音素開頭的單詞前；the這個/這些，定冠詞，表示特指。分析句子可知，第一空表泛指，泛指大象，應使用不定冠詞，且elephant是以元音音素開頭的單詞，因此使用an修飾；第二空表特指，特指上文的提到的那只大象，因此使用定冠詞the。故選B。12．—________dotheykillelephants?—Becausetheykillthem________theirivory.A．What;on B．What;for C．Why;for D．Why;on【答案】C【詳解】句意：——他們?yōu)槭裁礆⒋笙?？——因為他們?yōu)榱讼笱罋⒘怂鼈儭？疾樘厥庖蓡柧?、介詞辨析。What什么，問事或物；why為什么，問原因；on在……上面；for為、給……，表動作的對象、原因；根據(jù)答語“Becausetheykillthem…”判斷空格1是為什么，疑問詞用why；從文字的表層意思可知空格2指為了象牙殺了它們，故選C。13．—________doesthegirl________?—Australia.A．Where;befrom B．Why;comefrom C．Where;comefrom D．When;befrom【答案】C【詳解】句意：——這個女孩來自哪里？——澳大利亞?？疾樘厥庖蓡柧浼皠釉~短語。where哪里，詢問地點；why為什么，詢問原因；when什么時候，詢問時間；be/comefrom來自……，固定短語。根據(jù)答語“Australia.”可知，此處是詢問地點的，應使用where提問；由句中的助動詞“does”可知，謂語動詞應為行為動詞，因此此處使用comefrom，表示“來自”。故選C。14．He’s________andeveryoneofuslikestomake________withhim.A．friends;friendly B．friendly;friend C．friendly;friendly D．friendly;friends【答案】D【詳解】句意：他很友好，我們每個人喜歡和他交朋友?？疾樾稳菰~和名詞用法。friend朋友；friendly友好的；第一空前有be動詞is，后接形容詞作表語，故填friendly；第二空根據(jù)短語搭配“makefriendswithsb.”與某人交朋友，故填friends。故選D。15．—Mydogcanwalk________twolegs________alongtime.—Wow!Whatacleverdog!A．to;for B．on;for C．on;at D．into;for【答案】B【詳解】句意：——我的狗可以用兩條腿走很長時間?！郏《嗦斆鞯墓钒?！考查介詞辨析。to到；for持續(xù)，后跟一段時間；on由……支撐；at在……時刻，后跟時間點；into進入；walkontwolegs“用兩條腿走路”，on表示依靠，意思是(身體重量)由(某部位)支撐；根據(jù)“alongtime很長一段時間”可知，第二空使用for。故選B。三、補全對話根據(jù)下面對話中的情境，在每個空白處填入一個適當?shù)恼Z句，使對話恢復完整。A:Sarah.What’syourfavoriteanimal?B:Panda.Ilovepandasverymuch.A:16?B:Becausetheyareverycuteandfunny.A:17?B:MostofthemliveinthedeepforestsofSichuanProvince.A:IheardthattherearemanypandasinChengduResearchBase.Haveyoueverbeenthere?B:18.Iwenttherewithmyparentslastsummer.A:19?B:Sure.Iknowthatababypandaonlyweighsabout0.1to0.2kilos.A:That’ssosmall.I’mgoingtoSichuantoseepandasthissummervacation.B:20.A:Thankyou.【答案】16．Whydoyoulovepandas17．Wheredotheylive18．Yes19．Canyoutellmemoreaboutthepanda20．Haveagoodtime【導語】本文是A和B之間的一則對話。對話主要談論大熊貓。16．根據(jù)上文“Ilovepandasverymuch.”及下文“Becausetheyareverycuteandfunny.”可知，此處詢問喜歡大熊貓的原因。故填Whydoyoulovepandas。17．根據(jù)下文“MostofthemliveinthedeepforestsofSichuanProvince.”可知，此處詢問大熊貓的生活地點。故填Wheredotheylive。18．根據(jù)上文“Haveyoueverbeenthere?”及空后的“Iwenttherewithmyparentslastsummer.”可知，此處為肯定回答。故填Yes。19．根據(jù)下文“Sure.Iknowthatababypandaonlyweighsabout0.1to0.2kilos”可知，此處應是詢問是否可以告訴我更多關于熊貓的事情。故填Canyoutellmemoreaboutthepanda。20．根據(jù)上文“I’mgoingtoSichuantoseepandasthissummervacation.”及下文“Thankyou.”可知，此處表示祝愿對方玩得開心。故填Haveagoodtime。四、完形填空Somepeoplelikepandasbecausethey’recute.Somepeoplelikedogsbecausetheycan21themdomanythings.Ionlylike22becausetheyarebigandstrong(強壯的).Butmanyothersthinktigersare23,becausetheyliketotakeotheranimalsasfood.Tigerscanrun24,sotheyaregoodatcatching(抓住)otheranimals.Usuallythey25inthedaytime.Butwhennightcomes,theylookforfoodandwater.Atigerlivesallbyitselfduringmostofitslife,butbabytigerslivewiththeirfamilybeforetheyare2or3yearsold.Whentheygrowup(長大),themothertigerswill26them.Now,lotsoftigersarein27.Manybadpeoplekilltigers28heirfurandmeat.Theyusetheirfurtomakeclothesandbags.Theyselltheirmeattopeopleformeals.Wemust29this.Andweshoulddosomethingtosavetigers,becauseanimalsarealsoourfriends.Ifwedo30,soontherewillbenotigersintheworld!21．A．keep B．help C．show D．listen22．A．pandas B．lions C．tigers D．elephants23．A．lazy B．cute C．beautiful D．scary24．A．early B．quick C．fast D．slowly25．A．sleep B．run C．practice D．watch26．A．teach B．leave C．fight D．follow27．A．dangerous B．happiness C．danger D．exercise28．A．on B．in C．a(chǎn)bout D．for29．A．stop B．clean C．bring D．join30．A．everything B．a(chǎn)nything C．nothing D．something【答案】21．B22．C23．D24．C25．A26．B27．C28．D29．A30．C【導語】本文介紹了作者喜歡老虎，并介紹了一些關于老虎的情況，同時呼吁大家保護老虎。21．句意：有些人喜歡狗，因為狗可以幫助他們做很多事情。keep保持；help幫助；show展示；listen聽。根據(jù)“Somepeoplelikedogs”可知，狗可以幫助人們做很多事情，故選B。22．句意：我只喜歡老虎，因為它們又大又強壯。pandas熊貓；lions獅子；tigers老虎；elephants大象。根據(jù)“Butmanyothersthinktigers”可知，是指老虎，故選C。23．句意：但是還有很多人認為老虎很可怕，因為它們喜歡把其他動物當作食物。lazy懶惰的；cute可愛的；beautiful美麗的；scary嚇人的。根據(jù)“becausetheyliketotakeotheranimalsasfood.”可知，有些人認為老虎很嚇人，故選D。24．句意：老虎跑得很快，所以它們善于捕捉其他動物。early早的；quick快的；fast快；slowly慢地。根據(jù)“sotheyaregoodatcatching(抓住)otheranimals”可知，老虎跑得很快，此處應用副詞fast修飾動詞，故選C。25．句意：它們通常在白天睡覺。sleep睡覺；run跑；practice練習；watch觀看。根據(jù)“Butwhennightcomes,theylookforfoodandwater.”可知，老虎白天睡覺，晚上覓食，故選A。26．句意：當它們長大后，老虎媽媽會離開它們。teach教；leave離開；fight打架；follow跟隨。根據(jù)“Atigerlivesallbyitselfduringmostofitslife,butbabytigerslivewiththeirfamilybeforetheyare2or3yearsold”可知，老虎長大后，媽媽就會離開它們，故選B。27．句意：現(xiàn)在，許多老虎處于危險之中。dangerous危險的；happiness幸福；danger危險；exercise練習。根據(jù)“Manybadpeoplekilltigers...heirfurandmeat”可知，許多老虎處于危險中，indanger“處于危險中”，故選C。28．句意：許多壞人為了老虎的皮毛和肉而殺死老虎。on在……上；in在……里；about關于；for為了。根據(jù)“Manybadpeoplekilltigers...heirfurandmeat”可知，這些人為了老虎的皮毛和肉而殺死老虎。故選D。29．句意：我們必須阻止這樣的事情。stop停止；clean清理；bring帶來；join參加。根據(jù)上文介紹可知，我們需要阻止這些惡劣的行為，故選A。30．句意：如果我們什么都不做，世界上很快就不會有老虎了！everything一切；anything任何事；nothing沒什么；something某事。根據(jù)“soontherewillbenotigersintheworld”可知，如果大家什么都不做，世界上很快就不會有老虎了，nothing符合語境，故選C。閱讀理解ADoyouknowkiwi,akindoffruit?ItsChinesenameisMihoutao.Canyouguesswhat“therunningkiwi”is?ItisabirdthatlivesonlyinNewZealand.Itsoundslike“keewee”,sopeoplenameitkiwi(鷸鴕).Itisasbigasachicken.Itsmouthisverylonganditseyesareverysmall.Ithastwofeetandeachfoothasfourtoes.Ithashaironitsbody,butitdoesn’thaveanyfeathers(羽毛)likeotherbirds.Soitcan’tfly.Don’tyouthinkit’sveryspecial?Akiwilikestohavealotoftreesaroundit.Itsleepsinthetreeholes(樹洞)alldaybecausethesunlighthurtsitseyes.Italwayscomesoutforfoodatnight.Itcan’tseewellbutitcansmell(聞)thingswithitsnose.Itistheonlybirdthatcansmellthingsverywell.Thekiwi’seggsareverybig.ThereareonlyafewkiwisinNewZealandnow.Peoplemayneverseethemagainsotheycan’tkill(殺害)kiwisanymore.NewZealanderswanttheirkiwistolive.ThereisapictureofakiwionNewZealandmoney.SometimeswecallpeoplefromNewZealandkiwis.31．Howdoesthewriterstartthepassage(文章)?A．Byaskingquestions(提問). B．Bylistingnumbers(列數(shù)字).C．Bygivingexamples(舉例). D．Bymakingdefinitions(下定義).32．Whydopeoplethinkthekiwiisaspecialbird?A．Becauseitisasbigasachicken. B．Becauseithasalongmouth.C．Becauseithaseighttoes. D．Becauseitcan’tflyatall.33．Whatcanthekiwidoaccordingto(根據(jù))Paragraph(段落)2?A．Itcanlookforfoodallday. B．Itoftensleepsinthetrees.C．Itdoeswellinsmellingthings. D．It’seasyforittoseethings.34．Fromthepassage,thekiwicanbe________.①abird

②fruit

③money

④aNewZealanderA．①②③ B．①②④ C．①③④ D．②③④35．Whatcanbethetitle(標題)ofthepassage?A．TheLookofKiwi B．TheHometownofKiwi C．Kiwi—ASpecialBird D．Kiwi—ADangerousBird【答案】31．A32．D33．C34．B35．C【導語】本文主要介紹了一種特殊的鳥——鷸鴕。31．推理判斷題。根據(jù)第一段“Doyouknowkiwi,akindoffruit?ItsChinesenameisMihoutao.Canyouguesswhat‘therunningkiwi’is?”可知。作者以提問的方式開啟本文。故選A。32．細節(jié)理解題。根據(jù)第一段“Soitcan’tfly.Don’tyouthinkit’sveryspecial?”可知，鷸鴕很特別是因為它不會飛。故選D。33．細節(jié)理解題。根據(jù)第二段“Itistheonlybirdthatcansmellthingsverywell.”可知，鷸鴕的嗅覺很靈敏。故選C。34．細節(jié)理解題。根據(jù)第一段“Doyouknowkiwi,akindoffruit?ItsChinesenameisMihoutao”和“Canyouguesswhat‘therunningkiwi’is?ItisabirdthatlivesonlyinNewZealand.”和第三段SometimeswecallpeoplefromNewZealandkiwis.可知，kiwi指水果、鳥類和新西蘭人。故選B。35．標題歸納題。通讀全文可知，本文主要介紹了一種叫鷸鴕的鳥類，而且它們很特別。故選C。BAfricanelephantsareverylargeanimals.Theyarethelargestanimalslivingonland.AnadultAfricanelephantcanbetwiceastallasthemanandweighsixtonsormore.Africanelephantshaveverylargeears.SomepeoplethinktheirearsareliketheshapeofAfrica.Thelargeearshelpkeepthemcool.Africanelephantshavelongtrunks(象鼻).Theyusetheirtrunkstodrinkwaterandthenspray(噴灑)themselves.Thisisanotherwaytokeepcool.Theyalsospraydust(塵土)ontheirbodiestoprotectthemfromthehotsun.Theyusetrunksformanyotherthings.Thetrunkisanoseforsmelling.Elephantsmakeasoundthroughtheirtrunks.Theycanusetrunksforpickingupthings,suchasfood.Africanelephantsusuallyfeedonbananas,treeleavesandotherplants.Theyoftenspendaboutsixteenhourshavingfoodaday.AnadultAfricanelephantcanhave150kgto200kgoffoodaday.AfricanelephantsareindangerbecausepeoplekilltoomanyAfricanelephantsfortheirivory.Onlyinthelastyearpeoplekilledmorethan20,000ofthem!Theyarebecomingfewerandfewernow.Weshouldprotectthemnow!根據(jù)短文內(nèi)容，判斷正誤（正確“T”，錯誤“F”）。36．Africanelephantsarethebiggestanimalsonland.37．ThebabyAfricanelephantscanbetwicetallerthantheman.38．Africanelephantsonlyhasonewaytokeepthemcool.39．ItusuallytakestheAfricanelephantsmorethanhalfofthedaytoeatfoodeveryday.40．ThepassagemainlytellsusthefoodoftheAfricanelephants.【答案】36．T37．F38．F39．T40．F【導語】本文是一篇說明文，主要講述了非洲象的特點和生活習性。36．細節(jié)理解題。根據(jù)“Africanelephantsareverylargeanimals.Theyarethelargestanimalslivingonland.”可知，非洲象是陸地上最大的動物。故選T。37．細節(jié)理解題。根據(jù)“AnadultAfricanelephantcanbetwiceastallasthemanandweighsixtonsormore.”可知，一頭成年非洲象的身高可以是人的兩倍，體重可以達到六噸甚至更多。所以該題“非洲象的幼象可以比人類高兩倍?！钡谋硎雠c原文不符。故選F。38．細節(jié)理解題。根據(jù)“Thelargeearshelpkeepthemcool.”及“Africanelephantshavelongtrunks(象鼻).Theyusetheirtrunkstodrinkwaterandthenspray(噴灑)themselves.Thisisanotherwaytokeepcool.”可知，非洲象有長長的鼻子。它們用鼻子喝水，然后給自己噴水。這是另一種保持涼爽的方法。該題”非洲象只有一種方法來保持涼爽?！钡谋硎霾环显摹９蔬xF。39．細節(jié)理解題。根據(jù)“Theyoftenspendaboutsixteenhourshavingfoodaday.”可知，它們通常每天花大約16個小時吃食物。該題“非洲象每天通常要花半天以上的時間來吃東西?！钡谋硎龇显?。故選T。40．主旨大意題。根據(jù)通讀全文可知，文章主要講述了非洲象的特點和生活習性。所以該題“這篇文章主要告訴我們非洲象的食物。”的表述不符合原文。故選F。COnApril19th,theChinaWildlifeConservationAssociation(中國野生動物保護協(xié)會)signedanagreementwiththeSanFranciscoZoo.41They’llarrivein2025.“SanFranciscoisveryexcited,”saidthelocalpeople.“It’sanhonorforourcitytobechosenasalong-termhomeforgiantpandas.”Giantpandaswereonceendangered.42TheU.S.isamongthefirstcountriestoworkwithChinatoprotecttheseanimals.Together,they’vebred(繁育)seventeenbabypandassincethe1990s.“GiantpandasarenotjustanationaltreasureofChina,”saidLinJian,spokespersonfortheChineseForeignMinistry.“43They’rebridgesforfriendship.”44TheyallliveatZooAtlanta.Thatagreementisabouttoendlaterthisyear.InFebruary,ChinaannouncedthatitwouldsendapairofpandastotheSanDiegoZoo.45ChinahasselectedYunChuanandXinBaoforthisspecialtrip.A．They’realsolovedbypeoplearoundtheworld.B．Rightnow,thereareonlyfourgiantpandasintheU.S.C．Itwillsendapairofgiantpandastothezooforthefirsttime.D．Thankstoscientists’hardwork,therearenearly1,900pandaslivinginthewild.E．Thismarksanewroundofcooperationbetweenthetwocountriesinprotectinggiantpandas.【答案】41．C42．D43．A44．B45．E【導語】本文主要介紹了中國野生動物保護協(xié)會與舊金山動物園簽署協(xié)議，將于2025年送一對大熊貓到該園的情況。41．根據(jù)“They’llarrivein2025.”可知，此處內(nèi)容和“被選的熊貓”相關。選項C“它將第一次把一對大熊貓送到動物園?！狈险Z境。故選C。42．根據(jù)“TheU.S.isamongthefirstcountriestoworkwithChinatoprotecttheseanimals.”可知，此處指科學家對保護大熊貓作出的努力。選項D“多虧了科學家們的努力，現(xiàn)在有將近1900只大熊貓生活在野外?！狈险Z境。故選D。43．根據(jù)“GiantpandasarenotjustanationaltreasureofChina,”可知，大熊貓受到國內(nèi)外人們的喜愛。選項A“它們也受到世界各地人們的喜愛?！狈险Z境。故選A。44．根據(jù)“TheyallliveatZooAtlanta.”可知，此處介紹在美國生活的大熊貓的情況。選項B“目前，美國只有四只大熊貓?！狈险Z境。故選B。45．根據(jù)“Thatagreementisabouttoendlaterthisyear.InFebruary,ChinaannouncedthatitwouldsendapairofpandastotheSanDiegoZoo.”可知，此處介紹中國和美國新一輪的合作。選項E“這標志著兩國在大熊貓保護方面展開了新一輪合作?！狈险Z境。故選E。六、任務型閱讀TwentyyearsagoinCostaRica,threegirlsfoundababysloth(樹懶)onaroad.Thelittleanimal’smotherwaskilledbyacar.ThesegirlstookthebabyslothtoJudy,theownerofahotel.Judywantedtohelp,butshedidn’tknowhowtolookafterthesloth,soshecalledthezoo.Withthehelpofthezoo,Judytookgoodcareofthebabysloth.ShenamedthebabyslothButtercup.Afterherfirstsuccess,morepeoplebroughtJudywounded(受傷的)slothsorbabyslothstheyfound.Judythenopenedahelpcentre.Today,thehelpcentrehassavedmorethan500sloths.SlothsmainlyliveintheforestsofCentralAmerica.WecanalsoseesomeinSouthAmerica.Theyhangontothetreeswiththeirclaws(爪).Therearetwomaintypesofsloths.Youcanknowthembythenumberoftheirclaws.Slothshardlymove.Theyspendmostoftheirtimesleepinginthetrees.Butnow,withtheincrease(增長)ofpopulation,humanbeings(人類)causealotofproblemsfortheseslowandquietanimals.Themainproblemisthattheforestsarebecomingsmallerandsmaller.Whentreesarecutdown,slothswillfallandhurtthemselves.Someslothslivenearhumanbeingsandtheysometimesarehitbycarsorkilledbydogs.46．WhydidJudyopenahelpcentre?47．Wheredotheslothslive?48．Cantheslothsrunveryfast?49．Whatisthemainproblemforsloths?50．Whatcanwelearnfromthepassage?【答案】46．Becauseshewantstosavesloths.47．SlothsliveintheforestsofCentralAmericaandSouthAmerica.48．No,theycan’t.49．Themainproblemisthattheforestsarebecomingsmallerandsmaller.50．Weshouldstopcuttingdowntreesandprotectwildanimals.【導語】本文是一篇記敘文。文章主要講述了朱迪建立救助中心，救助樹懶的經(jīng)歷。46．根據(jù)第二段“morepeoplebroughtJudywoundedslothsorbabyslothstheyfound.Judythenopenedahelpcentre.Today,thehelpcentrehassavedmorethan500sloths.”可知，朱迪創(chuàng)辦了一個救助中心，救助了超過500只樹懶；據(jù)此可知朱迪開一個救助中心是為了救助樹懶。故填Becauseshewantstosavesloths.47．根據(jù)第三段“SlothsmainlyliveintheforestsofCentralAmerica.WecanalsoseesomeinSouthAmerica.”可知，樹懶住在中美和南美的森林里。故填SlothsliveintheforestsofCentralAmericaandSouthAmerica.48．根據(jù)第三段“Slothshardlymove”及最最后一段“theseslowandquietanimals”可知，樹懶幾乎不移動，樹懶很緩慢很安靜；據(jù)此可以推測，樹懶不能跑得很快，應用否定回答“no,主語+助動詞/情態(tài)動詞/助動詞+not”，指代復數(shù)名詞“Sloths”應用they，故填No,theycan’t.49．根據(jù)最后一段“Themainproblemisthattheforestsarebecomingsmallerandsmaller.”可知，樹懶面臨的主要問題是森林正在變得越來越小。故填Themainproblemisthattheforestsarebecomingsmallerandsmaller.50．開放性試題，言之有理即可。參考答案為：Weshouldstopcuttingdowntreesandprotectwild