有关连接词的语法填空(参考资料)

(1)Influenza,orflu,isacommoninfectionofthenoseandthroat,andsometimesthelungs.Thecauseisavirus[1]_______passesfromonepersontoanother.Thevirusspreadsthroughtheair[2]______aninfectedpersonexpelsairsuddenly.Medicalexpertshaveidentifiedthreemajorkindsofinfluenza.TheycallthemtypeA,BandC.TypeCistheleastserious.Peoplemaynotevenknowtheyhaveit.[3]______researchersstudytheothertwokindsveryclosely.Viruseschangetosurvive.Thiscanmakeitdifficultforthebodytorecognize[4]_______fightaninfection.Aperson[5]_____hassufferedonekindofflucannotdevelopthatsamekindagain.Thebody’sdefensesystemproducesantibodies（抗体）.Thesesubstancesstayinthebloodanddestroythevirus[6]______itappearsagain.[7]______thebodymaynotrecognizeafluvirus[8]________hasevenasmallchange.Eachyear,researchersdevelopvaccines（疫苗）topreventthespreadofthefluvirus.TheWorldHealthOrganizationholdsmeetingsin[9]______expertsdiscuss[10]______kindsoffluvirusestoincludeinthenextvaccine.keys1.that/which。引导定语从句并在从句中作主语。2.when。引导状语从句。“当感染者突然呼气时，病毒就传播到空气中。”3.But。转折关系。C型流行性感冒不为人所觉察，但研究人员认真研究另外两种。4.and。“识别并与感染作斗争”，并列关系。5.who。引导定语从句并在从句中作主语。6.if/when。引导状语从句。7.But。抗体能破坏病毒，但当病毒有细微改变时身体却无法识别它，转折关系。8.that/which。引导定语从句并在从句中作主语。9.which。引导定语从句。inwhich指代inthemeeting。10.what。引导宾语从句。专家讨论下一代疫苗将包含哪些流感病毒。(2)Americanscientistshavediscoveredthatwalnuttreescanproducemorethanwalnuts.Thescientistssaywalnuttreesalsocanmakeachemicalformofthepopularpain-killingmedicineaspirin.Thetreesdothisunderthestressofdisease[1]____otherthreats.Scientistssaythechemicalmayhelpthetreesreducedamagefromdryweather,unseasonabletemperatures[2]____otherchangesintheenvironment.Theresultsareimportant[3]_________presenceofthechemicalcouldwarngrowersearly[4]______atreeisindanger.Growerscouldrecognizeaproblem[5]_____leavesonwalnuttreesdieandfalloff.Thescientistssaidthefindingsalsoshow[6]_____aplantcancommunicatewithotherplantsthroughtheatmosphere.Forexample,atreecouldcommunicate[7]_______itisunderattackfrominsects.Withthatinformation,agrowercouldbegincorrectivetreatment.Researchershaveknownforalongtime[8]_______laboratoryplantsmayproducemethylsalicylate,aspirin’schemicalform.Aspirinwasfirstproducedfromthebarkcoveringonwillowtrees.[9]______theresearchershadneverbeforefoundmethylsalicylateinaforest.Theyhadnotconfirmedthattreescouldemit,[10]_____giveout,largeamountsofthechemicalintotheatmosphere.keys1.or。“疾病的压力或者其它威胁”是选择关系，故用or。2.and。并列关系，用and.3.because。因果关系。译文：“这项研究结果重要，因为这种化学物质的存在能够向种植者发出树木有危险的警告”。4.that。引导宾语从句。warnsb.that...，向某人警告某事。5.before。树叶死亡或落下之前就发出警告。6.that。引导宾语从句。7.when。引导时间状语从句。当树木受到昆虫攻击时，能与其它树木进行信息交流。8.that。引导宾语从句，从句及物动词grow的宾语。9.But。转折关系。此句译为：“阿斯匹林最初产于柳树皮，但之前研究人员没有在森林中发现水杨酸甲酯。”10.or。逗号后用or可以表示解释，“或者说”。(3)Mymotherinsisted[1]______everyoneinherlifetreatherwithrespect.[2]_______shewasn’twealthy[3]____welleducated,mymothernotonlyunderstoodandappreciatedhervalue,[4]________believedinitstrongly.[5]______shelearnedmyfatherwascheatingonher,sheinsisted[6]______hemoveoutofourhome.Notthenextdayorthenextweek...Tome,asachild,[7]_______sherefusedtotakemyfatherbackseemedharsh,evencruel.Asawoman,however,Ihavecometounderstandit.Formymother,puttingDaddyoutofthehouse[8]______herlifewasn’taboutpride;itwasaboutprinciple,theoneshehadalwayslivedby,theone[9]__________shebelievedinwithallherheart:Noonewasgoingtoloveandrespectyou[10]______youlovedandrespectedyourself.keys1.that2.Though3.or4.but(also)5.When6.that7.that8.and9.that/who/whom10.unless