we have always been warned of the dangers of forest fires完形填空答案

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1、Wehavealwaysbeenwarnedofthedangersofforestfires完形填空答案　　Wehavealwaysbeenwarnedofthedangersofforestfires.Theycause_____85_____toaforest.Theykillmanyplantsandanimalsinaneco-system,whichisagroupoflivingthingsandtheirenvironment.Buthaveyoueverheardofaforestfirethatcanbe_____86_____foraforest?Peoplest

2、artsomeofthefireswithaspecialreasontoactuallydogoodtotheeco-system.　　Infact,firesareanaturalpartofanyeco-system.Withoutfires,theoldestandlargesttreeswouldstopsunlightfromreachingtheforestfloor.Firescan_____87_____someoftheseoldtrees.Whenthetreesdie,theyprovidesomethinggoodfortheearth.Newtreescan

3、growstrongandhealthyintheirplace.　　Sometreesevenneedfirestogrow.Thesetreesholdtheirseeds(种子)inside.Heatfromafireallowsthecoatoftheseedstoopenup.Thentheseedsfalltothegroundandhavethe_____88____togrow/　　Scientist,whoknowaboutnature’sneeds,startsomeofthesefires,calledcontrolledburns.Afireisstarteda

4、ndkeptundercontrol.Thisway,thefiredoesnotspreadoutoftheareaor_____89_____aafterforestfires,theycangohungry_____90_____theirfoodhasbeendamagedinthefire.Small,controlledfiresmeanthananimalswillnothavetomovefartofindfood.Aftersometime,smallplantsbegintogrow.Animalsreturnsoonaftertheplantsreturn.Thi

5、s_____91_____makesaneco-system.　　Sothenexttimeyouhearaboutaforestfire,thinkaboutthegoodaswellasthebad.Itmaytakeaneweco-systemawhiletoreturn,butitwilllikelycomebackstrongerandhealthierthanever.　　)illnessB)difficultyC)damageD)flood　　2.A)helpfulB)powerfulC)harmfulD)awful　　3.A)taketheplaceofB)getrea

6、dyforC)bebadforD)getridof　　)timeB)waterC)chanceD)skill　　)discoverB)coverC)butD)waste　　6.A)becauseB)althoughC)butD)so　　)almostB)againC)neverD)even　　　　　　　　【解析】【主旨大意】　　文章指出森林火灾并不像人们想象的那样一无是处，有时候，可控范围内的火灾不仅无害而且还具有积极意义。比如，可控制的火灾可以使森林里的老树、死树烧掉，使阳光能够照射到地面；火灾烧掉了一些种子外层包裹的厚厚的皮，并让种子有机会得以在地面上生根发芽。　　1.该句意为“森

7、林火灾会对森林引起毁坏”，damage名词，意为“毁坏、损害”，flood名词，意为“洪水”；illness意为“疾病”选项C意为“困难”，故由句意答案选C；　　2.由后边的那句话可以知道“有时候森林火灾对森林系统还是有帮助的”，故答案选A；　　3.该句意为“森林火灾可以烧掉一些老树”，getridof意为“去掉，除去”，故选D；而选项A为“取代，代替……”，选项B是“为……做好准备”，选项C为“对……有害处”，A、B、C均不符合题意；　　4.