trees should only be pruned when there is a good and clear reason for doing so and 任务型阅读答案

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1、Treesshouldonlybeprunedwhenthereisagoodandclearreasonfordoingsoand任务型阅读答案　　阅读短文，用合适的单词填空。　　Treesshouldonlybeprunedwhenthereisagoodandclearreasonfordoingsoand,thenumberofsuchreasonsissmall.Pruninginvolvesthecuttingawayofovergrownandunwantedbranches,andtheinexperiencedgardene

2、rcanbeencouragedbythethoughtthatmoredamageresultsfromdoingitunnecessarilythanfromleavingthetreetogrowinitsownway.　　First,pruningmaybedonetomakesurethattreeshavedesiredshapeorsize.Theobjectmaybetogetatreeoftherightheight,andatthesametimetohelpthegrowthofsmallsidebranches,whi

3、chwillthickenitsappearanceorgiveitaspecialshape.Secondly,pruningmaybedonetomakethetreehealthier.Youmaycutoutdiseasedordeadwood,orbranchesthatarerubbingagainsteachotherandthuscausewounds.Thehealthofatreemaybeencouragedbyremovingbranchesthatareblockingupthecenterandsopreventi

4、ngthefreemovementofair.　　Oneresultofpruningisthatanopenwoundisleftonthetreeandthisprovidesaneasyentryfordisease,butitisawoundthatwillheal.Oftenthereisaracebetweenthehealingandthediseaseastowhetherthetreewillliveordie,sothatthereisaperiodwhenthetreeisatrisk.Itshouldbetheaimo

5、feverygardenertoreducethatriskofdeathasfaraspossible.Itisimportanttomakethearea,whichhasbeenpruned,smoothandclean,forhealingwillbesloweddownbyroughness.Youshouldallowthecutsurfacetodryforafewhoursandthenpaintitwithoneofthematerialsavailablefromgardenshopsproducedespeciallyf

6、orthispurpose.Pruningisusuallydoneinwinter,forthenyoucanseetheshapeofthetreeclearlywithoutinterferencefromtheleavesandalsoitisveryunlikelythatthecutsyoumakewillbleed.Ifthisdoeshappen,itis,ofcourse,impossibletopaintthemproperly.　　Pruningtrees　　Agoodgardenerprunesatreewhen(-1

7、)_______.　　(2)_______forpruningtrees.First,makethetreesin(5)_______shapeorsize.　　Second,makethetrees(6)_______.　　One(3)_______ofpruningtrees.Anopenwound(7)_______easy(8)_______fordisease.　　Reduce　　the(4)_______ofthedeathofatree.Makethewound(9)_______andclean.　　Paintthewound

8、(10)_______itdries.　　任务型阅读13　　【主旨大意】主要讲述了给树木剪枝的必要性和好处。　　1.necessary4.risk　　6.healt