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Unit7ProtecttheEarth知识点及练习◆重要句型1.Weusewatertocleanthings.我们使用水洗东西。解析：短语use…to…的意思是__________________如：我们使用木头做椅子。__________________________________________2.Mostofourenergycomesfromcoalandoil.我们大多数能源来自煤炭和石油。解析：来自（两种）________________________________如：Jack来自美国。（两种）____________________________________________________________3.Let’smakeaposterandtellthemaboutit.我们做张海报告诉他们关于这。解析：短语tell…about…的意思是_________________,tell和about后面的代词要用______形式。◆核心语法情态动词本身有一定的词义，但不能单独使用，必须与后面的动词原形构成句子的谓语，情态动词无人称和数的变化。常见的情态动词有：________________________________________________________________.现在一起了解下含情态动词的各种句式：1）肯定句结构：主语+情态动词+动词原形+其他。如：你现在应当看书了。______________________________________________2）否定句结构：主语+情态动词+not+动词原形+其他。如：我们不应该浪费能源。_____________________________________________3）一般疑问句结构：情态动词+主语+动词原形+其他？如：---我们现在去图书馆好吗？---好主意。---________________________________?-----______________________.4）特殊疑问句结构：特殊疑问词+情态动词+主语+动词原形+其他？如：---我们现在应当做什么？----我们现在应当等我们的爸爸妈妈。----____________________________?----__________________________________.◆实战演练一、用正确的介词填空。1.Weusewater_________drink.2.Mikecomes____________theUK.3.Thereisnotmuchenergy__________theEarth.4.Readinginbedisbad__________oureyes.5.Canyoutellmesomething_________yourschool?二、单项选择。（）1.Canyoudraw_________Earth?A.aB.anC.theD./（）2.Weneedalotof_____________.A.energyB.energiesC.aenergyD.anenergy（）3.Thereare______plasticbagsandbottlesaroundus.A.toomanyB.toomuchC.manytooD.muchtoo（）4.---Where_______Jim_________?---TheUSA.A.is;comefromB.does;fromC.is;fromD.does;comesfrom（）5.Doingeyeexercises________oureyes.A.isgoodatB.aregoodatC.isgoodforD.aregoodfor（）6.Wecanreusepaper________boxes.A.makeB.makesC.makingD.tomake（）7.EarthDayison______________.A.1stAprilB.22ndAprilC.22ndMayD.5thJune（）8.Let’smeet________theschoolgate.A.inB.onC.atD.for（）9._________niceposter!A.WhatB.WhataC.HowD.Howa（）10.Weshouldlove______protectourEarth.A.andB.orC.withD.but三、用所给单词的适当形式填空。1.---Istheplasticbottle_________（use）？---Yes,wecan___________(reuse)it.2.Weusethepaper__________(make)apaperplane.3.There________(be)muchwateronEarth.4.Sam_________(come)fromtheUSA.5.Weclean________(we)classroomeveryday.6.Therearen’t_________(some)applesinthebasket.7.Treeshelp________(keep)theairclean.8.There’snot__________(many)energyonEarth.9.Hestarts__________(draw).10.Everyoneshould__________(save)energy.四、按要求改写句子。1.Youcanputtheposteronthewall.(改为否定句)You_______________theposteronthewall.2.Thereissomewaterinthebottle.(改为一般疑问句)_______there_______waterinthebottle?3.Weshouldplantmoretrees.(对画线部分提问)________________we____________?4.Canwecutdownalotoftrees?(作否定回答)__________,____________________.5.Weshouldn’twastewater.(改为同义句)Weshould________water.6.Mikeisdoingaposternow.(用yesterday替换now)Mike_________aposteryesterday.五、根据中文提示完成句子。1.汽车使用大量的能源。_________use________________________energy.2.我们不应该使用太多的塑料袋。We_________________too_________plasticbags.3.我们可以使用木器制造许多东西。We________________wood_________________manythings.4.请不要扔垃圾到河里。_______throwtherubbish_________the__________.5.请捡起地上的塑料瓶。Please________________theplastic_________ontheground.六、阅读短文。Whentheweatherishot,yougotolakeoranocean.Whenyouarenearalakeoranocean,youfeelcool.Why?Thesunmakestheearthhot,butitcanmakethewaterverycold.Theairovertheearthbecomeshot,buttheairoverthewaterstayscool.Thehotairovertheearthgoesup(升起).Thenthecoolairoverthewatermovesinandtakestheplaceof(代替)thehotwater.Youcanfeelthewind.Andthewindmakesyoucool.Thescientistsknowalotaboutourplanet.Buttherearestillmanyanswersthattheydonotunderstand.（）1.Insummerit’s______nearalakeoranocean.A.hotB.coldC.coolD.warm（）2.Peopleusuallyliketogo______whentheweatherisveryhot.A.toalakeoranoceanB.toabigcityC.toasmallandhotcityD.intoalakeoranocean（）3.Theairovertheearthbecomeshotmuchfasterthan_________.A.theriverB.theseaC.thatoverthewaterD.theair（）4.Whichofthefollowingisnottrue?A.Thesunmakestheearthhot.B.Thesuncan’tmakethewaterverycold.C.Thewindmakesyoucool.D.Thehotairoverthewatermovesinandtakestheplaceofthecoldair.（）5.Thescientists___________________________.A.knownothingaboutourplanet.B.knoweverythingaboutourplanetC.knowanythingaboutourplanetD.arenotsureeverythingaboutourplanet.