改错练习ANearlyfiveyearsbefore,andwiththehelpbyourfather,mysisterandIplantedsomecherrytomatoes(圣女果)inourbackgarden.Sincethenforalltheseyearwehadbeenallowingtomatoestoself-seedwheretheyplease.Asresult,theplantsaregrowingsomewhere.Thefruitsaresmallinsize,butjuicyandtaste.Therearesomuchthatweoftensharethemwithourneighbors.Althoughweallowtomatoplantstogrowinthesameplaceyearafteryear,butwehaveneverhadanydiseaseorinsectattackproblems.Wearegrowingwonderfullytomatoesatnocost!BItisthreeyearsnowsinceIgraduatefromXinhuaHighSchool.LastSunday,theclassthatIwasonheldaget-together,whichtookusalongtimeprepare.Itwasindeednoteasytogetinthetouchwitheverybodyandsetawelltimeforallofus.Weallenjoyedapreciousdaygreatly,rememberthetimewespenttogetherandthepeopletheywerefamiliarwith.Itwasapitywhichsomeofuswerenotpresentastheyhadgonetoabroadforfurtherstudies,buttheycalledbackorsentgreetingcardfromdifferentplaces.CI'manAustralianboyaging17andI'mcrazyaboutmusic.Itisoneofthemostimportantthinginmylife.IlistenmusicwheneverIcan.Ihaveaminidiskplayer,withitIcanhaveaccesstomusicwhetherwalkinginthestreetorrideonthebus.Athome,therehasaCDplayerinmyroom,andthemusicisonallthetime.Ilikerockmusicbestofall.MyfavoritebandisRollingStones,whichhadproduced40albumssince1966.ItsohappenedthattherewasalivingconcertofRollingStoneslastSunday.Idecidedtogo.Itwasagreatfun.Iamalsofondofclassicalmusic.IespeciallyenjoyplayingBeethovenonceIamdoingmyhomework.DInmyview,theInternetishelpful.Itisknowntoall,theInternetisplayingaimportantpartinourdailylife.OntheInternet,wecanreadnewshomeandabroadandgotasmuchinformationaswecan,wecanalsoattendtothenetschoolandreadmanybooks.Wecanevendoshoppingonline.Beside,ourabilitytooperatethecomputercanbeimprovedgreat.SoweshouldnotbeaddictedtotheInternet,orwewillgetourlifeandstudydestroying.Inaddition,weshouldkeepofftheharmfulwebsite.Anyhow,thisdoesn'tpreventtheInternetfrombecomingourfriendETimeflylikeanarrow.I'malreadyinthesecondhalfofSeniorGrade3beforeIrealizedit.ItisonlyalittlemorethanthreemonthsbeforeIgraduatemiddleschool.Atthepresent,I'mbusyreviewmylessonsinordertotaketheCollegeEntranceExamination.IhopetogotoBeijingUniversity,thatisoneofthebestuniversitiesnotonlyinChinabutalsointheworld.I'lltrymybestturnmydreamtoreality.Mostofmyclassmatesarealsostudyingveryhardtorealizetheirdreams.Idowisheveryonewillbeabletoenteranuniversityorcollege.FInordertopromoteparticipationinoutdoorexercise,ourschoolhadorganizedanactivitytoclimbtheWestMountainonApril10.Themomentwearrivedatthefootofamountain,wesetoutforthetopinhighspirit.Wesupportedeachothertopasstherockyareasonthecourseoftheclimb.Laughingandcheering,weeventuallyreachedthesummit,thereweweregreetedbythebrightsunshineandfreshair.Viewingfromthetop,thecitywasextremelybeautifulThiseventwasverybenefit,fornotonlywetakeabreakfromourheavyschoolworkload,butwealsolearnedwhattocooperate.Therefore,westronglysuggestthatsimilareventsareheldeveryyear!答案and解析：A1:before—ago.ago“从现在起的若干时间以前”；时间段+ago与一般过去时连用。before泛指“从过去起的若干时间以前”，意思是“距过去某时……以前”“与其……（毋宁）”，常和完成时连用，这里谓语动词planted用的是过去式，故用ago。2:在……的帮助下用固定搭配withthehelpof。所以把by改成of。3:根据句意和前面的allthese可知，用可数名词year的复数形式years。alltheseyears的意思是这么多年。4:根据时间状语Sincethen可知，本句用现在完成进...
