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How muchdoes itcostIts now$
179.
99.It mayseem expensiveat first,but whenyou considermost devicesdontwork formore than10minutes,this is a prettygood deal.In fact,other productsusingthe sameUV technologyare pricedat over$250!Now youcan buyit fromour websitewith50%off andwith freedelivery fora limitedtime byclicking here.Note:The devicecan onlybe returnedor exchangedif itarrives damaged,and youmustpay in advance.
21.What isthe advantageof a MosquitronA.It ischeaper thanother devices.B・It doesn*t needbattery.C.It issilent whenworking.D.It killsmosquitoes withUV light.
22.What canyou enjoyif buyingaMosquitrononline nowA.A highdiscount.B・A cheapdelivery.C.Return withoutreasons.D.A greatgift.
23.What type of writingis thispassageA.An analysis.B.An advertisement.C.A story.D.A report.BIn dreamingup the programme Tennisand Literacyfor Youth,as amother,I hadhopedto sharetwo of my passions,tennis andreading,with children.Throughout theyear,I hadadvertised forparticipants atlocal elementaryschools andvolunteers atlocal highschools.With thehelp ofkind people,I appliedfor money.I waseven ableto secureacamp sitefor theprogramme.But on the firstday ofcamp,in spiteofmycareful planning,things didnot gothe way(球拍).I hadhoped.Hector andAdrian exchangedblows with their racquetsHectorstruggled tohis feetmoments later,covering abloody nosewith onehand.Georgie andEduardothrew ballsat eachother.Then duringthe reading time,I racedfrom joylesschildto demandingchild,unable toconvince evenone toopen abook.They wouldrather bewatchingNickelodeon athome,Mylea toldme,than learningstupid tennis and readingboringbooks”.That evening,exhausted asI was,I calledmy volunteerstogether fora meeting,andredesigned theentire curriculum.We createda goodfellow system,where eachvolunteerpaired witha camperto helphim orher during readingtime.To emphasizepraise andprogress,we establishedweekly prizeceremonies,presenting awardsfor mostimprovedreading,tennisandbehavior.In thefollowing days,with thechaos andthe schedulechanges andthe meetings,these children,once inbad moodduringreadingtime,untouched booksin theirlaps,beganto findjoy inreading astory andplaying tennis.One day,Mylea shutthe bookand askedme,“Can Itake thisto readit to my momtonight”Looking upat hereager face,I couldnthelp myself.I jumpedtomyfeet andwrappedher in a hug,lifting herright offthe ground.Its allyours!”I overjoyed.
24.What canwe learn from paragraph1A.The authorwas ateacher ofa highschool.B・Volunteers fromlocal schoolsdonated alot ofmoney.C.Local schoolsinvited the author toplan areading camp.D.The authormade goodpreparations for theprogramme.
25.Which canbe usedto describethe firstday of the campA.Successful.B.Messy.C.Smooth.D.Boring.
26.How didtheauthoradjust theprogrammeA.By replacingthe bookswith tennis.B.By helpingand inspiringthe campers.C.By callingonthechildren towork hard.D.By emphasizingthe importanceof reading.
27.What isthe passagemainly aboutA・A proposalof beingvolunteers.B.An improvementof theteaching facilities.C.A surveyon howto helpkids overcomedifficulties.D.An experienceof introducingreading andtennis tokids.CHigh onthe topof California*s WhiteMountains,the hardconditions makeit difficultforlife totake root.But fora certaintypeoftree-and forthose whohave travelledhere tostudyit-this placeisaperfect place.These bristleconepines arethe oldestindividual treesin the world.Researchers likeAndyBunn havecome tolearnfromthe ancients.Its remarkableto sithere andhave yourhandon oneof thesetrees andknow thatit wasgrowing whenthe Pyramidswere built.Bunn added.(样本)“By studyingsamples fromthe trunks,its possibleto discovertheir hiddenhistory.Each annualtree ringis likea timecapsule of the environmentfor thatyear fromwhichit wasformed,“said MattSalzer,a scientistat theUniversity ofArizonasLaboratory ofTree RingResearch.And itcontains manydifferent typesofinformation-chemical information,the informationon growth,and climateinformation.n“If youretrying tolook atpeople in the pastthrough time,tree ringsgive youa waytodo itinaway thatmakes senseinahuman life,“said Universityof ArizonaProfessorCharlotte Pearson.She firstbecame fascinatedwiththebristlecones afterreading aboutanancient volcaniceruption onthe Greekisland ofSantorini.“It blewmy mindthat treesonthe otherside of theworldcould possiblybe usedto datethis thingwithin asingle year,she saidexcitedly.The oldestknown livingbristlecone isestimated tobe over4,800years old.For Bunn,the climaterecord writtenin therings offersguidance forhow wemight thinkabout whatshappeninginthepresent aswe planforthefuture.What wereseeing increasinglyis thatalot of the climateevents thatwe areexperiencing andliving throughright nowhave no(古气候)example inthe paleoclimaterecord,“he said.So,we reallyare movingintounknown field/
928.Why doesBunn mentionthe Pyramidsin paragraph2A.To statethe trees1age isvery old.B・To provehis discoveryis important.C.To attractreaders1attention.D.To stressthe hardliving conditionof thetrees.
29.Whats thethird paragraphmainly aboutA.The resultoftheresearch.B・The processoftheresearch.C.The methodoftheresearch.D.The significanceoftheresearch.。