2019-2020年高三英语二轮复习 课时训练17 阅读理解＋完形填空＋语法填空＋短文改错

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1、2019-2020年高三英语二轮复习课时训练17阅读理解＋完形填空＋语法填空＋短文改错Ⅰ.阅读理解Eveniftreescannotwalk，theyarestillonthemove.InpartsoftheArctic，entireforestsaremovingnorthward.AcrosstheArctic，temperaturesarerisingfasterthananywhereelseintheworld.Asthathappens，thetreelinethatmarkswhereforestsstopandthetreelesstu

2、ndra(冻原)startshasbeenshiftingnorthward.Treesgrowingalongthetreelinemustprotectthemselvesfromthecoldwind.Todothis，plantstendtogrowhorizontal(水平的)brancheslowtotheground.Theenergyittakesfortreestogrowthiswaymeanstheydon’thaveenoughenergytomakeseeds.ButasEarth’sclimatehasbeenwarming，

3、treesnolongerhavetojustgrowhorizontally.Manycaninsteadgrowuptowardthesky.Thistakeslessenergy.Andwithallthatleftoverenergy，thesetreeshavestartedproducingmoreseeds.Thishappensespeciallyinplaceswherewhitespruce(白云杉)grows.Whitespruce，whichisaNorthAmericantree，isquiteabletoproducealot

4、ofseeds，whichcanmovelongdistancesinthewind.Whenwindblownseedsenduponthetundrabeyondthetreeline，theyeventuallycansprout(发芽)newtrees.Thisexplainshowaforestcanmove.Ofcourse，theprocesswouldworkonlyifthetundrawerewarmenough.Butinrecentyears，thewholeplanethasbeenwarming.Newtreeswillpro

5、videsheltersforsomesnow.Keepingthesun’sraysfrommakingthewhitesurfacedisappear.Instead，thetreesabsorbthesun’sheat.Thiswarmsthesurroundingair.Theextrawarmthencouragesevenmoretreestoproduceseeds.Thatfurtherboostsaforest’sabilitytoexpand.Inaddition，moretreeswilltrapmoresnow，preventin

6、gmuchofitfrombeingblownaway.Snowcantrapheatinthesoilbelow，whichencouragestreestogrow.Therecentriseoftemperatureshashelpedmoretreesgrowpastthetreeline.Peopleworryaboutimpactsontheanimalsthatdependonfrozenconditionsforfoodandshelter.1．WhatisthemaincauseofthetreesintheArcticmovingno

7、rthward?A．Theshrinkingofnortherntundra.B．Therisingtemperature.C．Thefierceandcoldwind.D．Theabundantresourcesinthenorth.2．Whatdoestheunderlinedword“this”inParagraph2mean?A．Toproducemoreseeds.B．Tomovenorthward.C．Torespondtotheclimatechange.D．Toprotectthemselvesfromthecoldwind.3．What

8、canbeinferredfromthelastparagraph?A．Newt