填空题Rearrange the letters given and make one word that uses all of the letters. B C E L N R U U T E

填空题{{B}}SectionC{{/B}}Instructions:Inthissection,thereisonepassagefollowedby5questions.Readthepassagecarefully,thenanswerthequestionsinamaximumof10words.RemembertowritetheanswersontheAnswerSheet.Welovethemsomuchthatsomeofussleepwiththemunderthepillow,yetweareincreasinglyconcernedthatwecannotescapetheirelectronicreach.Weusethemtoconveyourmostintimatesecrets,yetweworrythattheyareathreattoourprivacy.Were]yonthemmorethantheInteracttocopewithmodernlife,yetmanyofusdon'tbelieveadvertisementssayingweneedmoreadvancedservices.Sweepingasidethedoubtsthatmanypeoplefeelaboutthebenefitsofnewthirdgenerationphonesandfearsoverthehealtheffectsofphonemasts,arecentreportclaimsthatthelong-termeffectsofnewmobiletechnologieswillbeentirelypositive,solongasthepubliccanbeconvincedtomakeuseofthem.Researchaboutusersofmobilephonesrevealsthatthemobilehasalreadymovedbeyondbeingamerepracticalcommunicationstooltobecomethebackboneofmodernsociallife,fromloveaffairstofriendshiptowork.Onefemaleteacher,32,toldtheresearchers,"Ilovemyphone.It'smyfriend."Thecloserelationshipbetweenuserandphoneismostpronouncedamongteenagers,thereportsays,whoregardtheirmobilesasanexpressionoftheiridentity.Thisispartlybecausemobilesareseenasbeingbeyondthecontrolofparents.Buttheresearcherssuggestthatanotherreasonmaybethatmobiles,especiallytextmessaging,wereseenasawayofovercomingshyness."Textingisoftenusedforapologies,toexcuselatenessortocommunicateotherthingsthatmakeusuncomfortable,"thereportsays.Theimpactofphones,however,hasbeenlocalratherthanglobal,supportingexistingfriendshipsandnetworks,ratherthanopeninguserstoanewbroadercommunity.Eventhelanguageoftextinginoneareacanbeincomprehensibletoanybodyfromanotherarea.Amongthemostimportantbenefitsofusingmobilephones,thereportclaims,willbeavastlyimprovedmobileinfrastructure,providinggainsthroughouttheeconomy,andtheprovisionofmoresophisticatedlocation-basedservicesforusers.Thereportcallsongovernmenttoputmoreeffortintothedeliveryofservicesbymobilephone,withsuggestionsincludingpublictransportandtrafficinformationanddoctors'textmessages,toremindpatientsofappointments."Ilovethatidea,"oneusersaidinaninterview."ItwouldmeanIwouldn'thavetowriteahundredmessagestomyself."Therearemanyotherpossibilities.AtarecenttradefairinSweden,amobilenavigationproductwaslaunched.Whentheuserentersadestination,arouteisautomaticallydownloadedtotheirmobileandpresentedbyvoice,picturesandmapsastheydrive.Infuture,thesedeviceswillalsobeabletoplanaroundcongestionandroadworksinrealtime.Thirdgenerationphoneswillalsoallowforremotemonitoringofpatientsbydoctors.InBritain,scientistsaredevelopinganasthmamanagementsolution,usingmobilestodetectearlysignsofanattack.Mobilephonescanbeusedineducation.AgroupofteachersinBritainusethirdgenerationphonestoprovidefast,internetservicetochildrenwholivebeyondthereachofterrestrialbroadbandservicesandhavenoaccesstoonlineinformation."Asthenewgenerationofmobiletechnologiestakesoff,thesocialpotentialofthemobilewillvastlyincrease,"thereportargues.Questions:

填空题Chemicals are added to a huge variety of products to give them certain properties. Many of these common chemicals are toxic to mammals and other animals. For example, one class of chemicals, called alkylphenols, can 1 hormone systems and growth. Alkylphenols are often found in shampoo. Not only are these chemicals toxic, but they do not 2 biodegrade. In other words, they will be on our planet for a very, very long time. Chemicals with a combination of these properties are commonly known as "Persistent Organic Pollutants," or POPs. The combined effect of POPs on our health and on the environment is increasingly being studied and recognized. Some work has been done to control the use of POPs, but only 3 chemicals fall under current government controls. Additionally, companies don"t label their products with their chemical components, so consumers must do 4 to learn about them. Contrary to popular belief, POPs don"t stay locked away inside of the materials where they are used. These chemicals can escape and enter the soil during 5 . In fact, it now seems that no part of the planet is free of chemicals.

填空题There is no doubt that the environment is in trouble. Factories burn fos (46) fuels which produce acid rain, and this kills trees. At the same time, greenhouse gases rise into the air and con (47) to global warming, which threatens to melt the polar ice cap. Meanwhile, far (48) clear huge areas of rain forest in places such as the Amazon to produce feeding land for cattle or produce wood for building. Rivers and oc (49) are so heavily contaminated by industrial waste. Cars pump out poisonous gases which we all have to breathe in. Poaching and overfishing are killing off millions of animals, including whales, elephants and other endangered species. In fact, our finely balanced ecosystem is being (50) (system) destroyed by human greed and thoughtlessness. There is a lot we can all do, however, to help prevent this. The easiest thing, of course, is to (51) waste material such as paper and glass so that we can use it again. We should also check that the things we buy from supermarkets are packaged in biodegradable packaging which (52) (compose) easily. At the same time, we should make a conscious effort to avoid foods which are (53) (gene) modified (at least until someone proves that they are safe both for us and for the environment). Finally, of course, a small car and unleaded petrol should be used, which are less harmful to the environment or, even better, make more use of p (54) transport. We cannot all be as committed as environmentalists, but we can at least do our own little bit at grass roots level. We, as humans, have (55) (inhabitant) the earth, but that doesn't mean we can do whatever we like with it.

填空题Write an essay of no less than 160 words in response to the prompt below．Write the passage on the answer sheet． “Books are the quietest and most constant of friends；they are the most accessible and wisest of counselors，and the most patient of teachers．” －－－－－Charles W．Eliot

填空题Demographic indicators show that Americans in the postwar period were more eager than ever to establish families. They quickly brought down the age at marriage for both men and women and brought the birth rate to a twentieth century height 1 after mote than a hundred years of a steady decline, producing the "baby boom." 2 These young adults established a Rend of early marriage and relatively large families that went for more than two decades and caused a major but temporary 3 reversal of longterm demographic patterns. From the 1940s through the early 1960s, Americans married at a high rate and at a younger age than their 4 Europen counterparts. 5 Less noted but equally more significant, the men and women who formed 6 families between 1940 and 1960 nevertheless reduced the divorce rate after a 7 postwar peak; their marriages remained intact to a greater extent than did that of 8 couples who married in earlier as well as later decades. Since the United States 9 maintained its dubious distinction of having the highest divorce rate in the world, the temporary decline in divorce did not occur in the same extent in Europe. 10 Contrary to fears of the experts, the role of breadwinner and homemaker was not abandoned.

填空题What Is a Cyclone? Cyclones are huge revolving storms caused by winds blowing around a central area of low atmospheric pressure. In the northern hemisphere, cyclones, called hurricanes or typhoons, blow in an anti-clockwise direction. In the southern hemisphere, these tropical storms are known as cyclones, whose winds blow in a clockwise direction. Cyclones develop over warm seas near the Equator. Air heated by the sun rises very swiftly creating areas of very low pressure. As the warm air rises, its moisture condenses into massive thun-derclouds. Cool air rushes in to fill the void that is left, but because of the constant turning of the Earth on its axis, the air is bent inwards and then spirals upwards with great force. The swirling winds rotate faster and faster, forming a huge circle which can be up to 2,000 km across. At the centre of the storm is a calm, cloudless area called the eye, with no rain, and fairly light winds. As the cyclone builds up it begins to move, and is sustained by a steady flow of warm, moist air. The strongest winds and heaviest rains are found in the towering clouds which merge into a wall about 20-30 km from the storm's centre. Winds around the eye can reach speeds of up to 200 km/h, and a fully developed cyclone pumps out about two million tons of air per second. This results in more rain being released. Cyclones are dangerous for people living around tropical areas. The most destructive force of a cyclone is the fierce winds. These winds are strong enough to topple fences, sheds, trees, power poles and caravans easily. A cyclone typically chums up the sea, causing giant waves and surges of water known as storm surges which rush inland with deadly power, flooding low-lying coastal areas. Fill in each blank in no more than three words according to the passage. What Is a Cyclone? Definition Large circling storms with strong winds blowing around a central area. Location These storms form near the (56) over open water. They are called hurricanes and typhoons inthe northern hemisphere, and cyclones in the southern hemisphere. Causes 1. The warm moist air rises and tunas into thunderclouds. 2. Cool air flows in to fill the (57) left by the rising air. 3. The earth's movement makes the air bend inward and (58) upwards. The swirling windsrotate faster and faster. 4. As the cyclone builds it begins to move. Elements A. Towering clouds become a wall around the storm's centre. B. Winds circling the eye can reach (59) C. Heaviest rainfall is in the "Wall". Effects Winds canknockovertrees, houses, fences, power poles, etc. Chums up the sea into giant waves and (60) which cause flooding.

填空题Today, parents are (21) worried about the safety of their children, and because of this, they are not letting their children out to play. As a result, children are no longer playing outside but (22) in their rooms and losing themselves in (23) activities such as watching TV and playing computer games Yet, if they had the chance, they (24) get out of the house and go to the cinema, see friends or play sports. In fact, when asked what their idea of a good day was, only 1 in 7 said that they would turn on the television. British teenagers have always (25) their bedrooms, leaving the younger children to play in communal spaces such as the sitting room, garden or kitchen. However, children from the age of 9 are now turning to their bedrooms as a place to (26) . Bedroom culture is a (27) of the past 20 years with families getting smaller and homes getting more (28) . Increasing (29) has also (30) the rise of the bedroom culture.

填空题The following is part of a bus timetable. Express buses do not stop at some of the towns between Dawtry and Saresbury. DAWTRY 07:50 08:30 09:10 09:50 TAMSVILLE 07:59 … … 10:00 BRISTOWN 08:07 08:42 … 10:08 JAMCASTER 08:24 08:55 09:27 10:25 SARESBURY 08:33 09:04 09:36 10:33 How much less time does it take to travel on the fastest express bus from Dawtry to Saresbury than it does on a slow (non-express) bus?

填空题What is the problem which the authors worried about London's bid to host the 2012 Olympic Games?

填空题A man jogs at 6 mph over a certain distance and walks hack over the same route at 4 mph. What is his average speed for the journey?

填空题What Is a Cyclone? Cyclones are huge revolving storms caused by winds blowing around a central area of low at-mospheric pressure. In the northern hemisphere, cyclones, called hurricanes or typhoons, blow in an anti-clockwise direction. In the southern hemisphere, these tropical storms are known as cy-clones, whose winds blow in a clockwise direction. Cyclones develop over warm seas near the Equator. Air heated by the sun rises very swiftly creating areas of very low pressure. As the warm air rises, its moisture condenses into massive thun-derclouds. Cool air rushes in to fill the void that is left, but because of the constant turning of the Earth on its axis, the air is bent inwards and then spirals upwards with great force. The swirling winds rotate faster and faster, forming a huge circle which can be up to 2, 000 km across. At the centre of the storm is a calm, cloudless area called the eye, with no rain, and fairly light winds. As the cyclone builds up it begins to move, and is sustained by a steady flow of warm, moist air. The strongest winds and heaviest rains are found in the towering clouds which merge into a wall about 20-30 km from the storm' s centre. Winds around the eye can reach speeds of up to 200 kin/h, and a fully developed cyclone pumps out about two million tons of air per second. This results in more rain being released. Cyclones are dangerous for people living around tropical areas. The most destructive force of a cyclone is the fierce winds. These winds are strong enough to topple fences, sheds, trees, power poles and caravans easily. A cyclone typically churns up the sea, causing giant waves and surges of water known as storm surges which rush inland with deadly power, flooding low-lying coastal areas. Fill in each blank in no more than three words according to the passage. What Is a Cyclone? Definition Large circling storms with strong winds blowing around a central area. Location These storms form near the (56) over open water. They are called hurricanes and typhoons in thenorthern hemisphere, and cyclones in the southern hemisphere. Causes 1. The warm moist air rises and turns into thunderclouds. 2. Cool air flows in to fill the (57) left by the rising air. 3. The earth' s movement makes the air bend inward and (58) upwards. The swirling winds rotatefaster and faster. 4. As the cyclone builds it begins to move. Elements A. Towering clouds become a wall around the storm's centre. C. Heaviest rainfall is in the "wall". Effects Winds can knock over trees, houses, fences, power poles, etc. Churns up the sea into giant waves and (60) which cause flooding.

填空题Here is a puzzle. My first is in LAMP but not in LIGHT. My second is in MAY but not in MIGHT. My third is in DART and also in BOARD. My fourth is in STRING but not in CORD. My last is in SEE but not in GLANCE. I am a city renowned for romance. Where am I?

填空题Whichcodematchestheshapegivenattheendoftheline?

填空题I'veneverbeentoaprofessionalfashionshowbutmysisterisstudyingclothesdesignatcollege,andherclassputonanend-of-termfashionshowto(46)Iwasinvited.Ididn'treallywanttogobecauseIexpectedthewholethingtobea(47)(disaster)failure,soIratherunwillinglyagreedtogoalong.Theintroduction(48)theshowwasvery(49)(press)indeed-withallthemodelsperforminghandstandsandcartwheels.Itlookedabittooathleticforme-butthiscertainlysucceeded(50)gettingtheattentionoftheaudience.Ihadexpectedallthemodelstobef(51),butsurprisinglyenough,therewerequiteafewmalesmodelingtheclothes,(52)Theysaythere'sneveranythingtotallynewinfashionbuttheshowprovedthistobe(53)(true).Everythingthatthestudentshadcreatedlookednewandattractive.AsIlookedar(54)theaudience,Icouldsee(55)Isuspectedmightbepeoplelookingfornewtalent.Whatbetterplacetolookfornewtalentt(56)astudentfashionshow?Tomakethewholethingmore(57)(entertain),theyoungdesignershadaskedtheaudiencetojudgetheirsuccessandawarda(n)(58),secondandthirdprizesforthedesigns.Thereweresomany(59)(style)designstochoosefromthatwehada(n)h(60)time.Intheend,adesignofmysister'swonthesecondprize,soIwasincrediblypleasedforher!

填空题Insectsentombedinfossilisedamberfortensofmillionsofyearshaveprovidedthekeytocreatinganewgenerationofantibioticdragsthatcouldwagewaronmodemdiseases.Scientistshaveisolatedtheantibioticsfrommicrobespreservedeitherinsidetheintestinesoftheamber-encasedinsectsorinsoilparticlestrappedwiththemwhentheywerecaughtbystickytreeresinupto130millionyearsago.Sporesofthemicrobeshavesurvivedanunprecedentedperiodofsuspendedanimation,enablingscientiststorevivetheminthelaboratory.Researchoverthepasttwoyearshasuncoveredatleastfourantibioticsfromthemicrobesandonehasbeenabletokillmoderndrug-resistantbacteriathatcancausepotentiallydeadlydiseasesinhumans.Presentdayantibioticshavenearlyallbeenisolatedfrommicroorganismsthatusethemasaformofdefenceagainsttheirpredatorsorcompetitors.Butsincetheintroductionofantibioticsintomedicine50yearsago,analarmingnumberhavebecomeineffectivebecausemanybacteriahavedevelopedresistancetothedrugs.Theantibioticsthatwereinusemillionsofyearsagomayprovemoredeadlyagainstdrug-resistantmodernstrainsofdisease-causingbacteria.RaulCano,whohaspioneeredtheresearchattheCalifomiaPolytechnicStateUniversityatSanLuisObispo,saidtheancientantibiotichadbeensuccessfulinfightingdrug-resistantstrainsofstaphylococcusbacteria,a"superbug"thathasthreatenedthehealthofpatientsinhospitalsthroughouttheworld.Henowintendstoestablishwhethertheantibioticmighthaveharmfulsideeffects."Theproblemishowtoxicitistoothercellsandhoweasyitistopurify."saidCano.Abiotechnologycompany,Ambergene,hasbeensetuptodeveloptheantibioticsintodrugs.Ifanyancientmicrobesarerevivedthatresemblepresent-daydiseases,theywillbedestroyedincasetheyescapeandcausenewepidemics.Drugcompanieswillbeanxioustostudythechemicalstructuresoftheprehistoricantibioticstoseehowtheydifferfrommoderndrugs.Theyhopethatoneancientantibioticmoleculecouldbeusedasabasistosynthesisearangeofdrugs.TherehavebeenseveralattemptstoextractmaterialsuchasDNAfromfossilizedlife-forms,rangingfromEgyptianmummiestodinosaurs,butmanyweresubsequentlyshowntobeunsuccessful.Cano'sfindingshavebeenhailedasasignificantbreakthroughbyscientists.EdwardColenberg,anexpertonextractingDNAfromfossilizedlife-formsatWayneStateUniversityinDetroit,said:"Theyappeartobeverifiable,ancientspores.Theydoseemtobereal".RichardLenski,professorofmicrobialecologyatMichiganStateUniversity,saidthefightagainstantibiotic-resistantstrainsofbacteria,suchastuberculosisandstaphylococcus,couldbehelpedbythediscovery.However,eventhediscoveryofancientantibioticsmaynothalttheriseofdrug-resistantbacteria.StuartLevy,amicro-biologistatTuftsUniversityinBoston,warnedthatthebacteriawouldeventuallyevolvetofightbackagainstthenewdrugs."Theremightalsobeanenzymealreadyouttherethatcandegradeit.Sotheonlywaytokeepthelifeofthatantibioticgoingistouseitsensiblyandnotexcessively."hesaid.SummaryMicrobesthatmaysupplynewantibioticdrugshavebeen(1)inthebodiesoffossilisedinsects.Thediscoverymayhelpdestroy(2)bacteria.Whatneedstobedonenowistofindouthow(3)theyaretohumans.Itisthoughtthatasingleantibioticmoleculecouldleadtoawholeseriesofnewdrugs.Otherscientistswhohavetriedtoproduceantibioticsinasimilarwayhavebeen(4).ScientiststhinkCano'sfindingsarea(5)breakthroughinthefightagainstdiseases.

填空题There"sgoodnewsandbadnewsaboutlifeinmoderncities—first,thebad.Peoplewhostudypopulationgrowthpredictanightmarebytheyear2025:theglobalpopulationwillbemorethan8billion,andalmost4billionofthesepeoplewillbelivingincitiesindevelopingcountriessuchasIndiaandNigeria.Populationgrowthisalreadycausingunbelievableovercrowding.Nairobi,Kenya,hasbasicservicesfor200,000peoplebuthasapopulationof5million.MexicoCityishometoalmost25millionpeople.Bytheyear2025,populationexpertspredict,660millionpeoplewillbelivingincitiesinIndia.Duetoovercrowding,thesecitieshaveproblemswithairpollution,disease,andcrime.Peoplespendhoursingridlock—thatis,trafficsohorriblethatitsimplydoesn"tmove—whentheycommutedailyfromtheirhomestotheirworkandback.Thereisn"tenoughwater,transportation,orhousing.Manypeopledon"thaveaccesstohealthservicesorjobs.Nowthegoodnews:insomecities,insteadofworsening,urbanlifeisactuallygettingmuchbetter.Itmightnotbeasurprisetofindthatlifeinaffluentcitiesisimproving.Butwhataboutcitiesthataren"trich?ThecityofCuritiba,Brazil,provesthatit"spossibleforevenacityinadevelopingcountrytoofferagoodlifetoitsresidents.ThemayorofCuritibafortwenty-fiveyears,JaimeLerner,wasanarchitectandaverypracticalperson.Underhisleadership,thecityplannersestablishedalistofpriorities—inotherwords,alistofwhatwasmostimportanttoworkon.Theydecidedtofocusontheenvironmentandonthequalityoflife.Withanaverageincomeofonlyabout$200perpersonperyear,Curitibahasthesameproblemsasmanycities.However,italsohassomecreativesolutions.Onecreativesolutionisthemethodofgarbagecollection.Inneighborhoodsthatgarbagetruckscan"treach,poorpeoplebringbagsoftrashtospecialcentres.Atthesecentres,theyexchangethetrashforfreshproduce—suchaspotatoesandoranges—orforbustickets.Atarecyclingplant,workersseparatebottles,plastic,andcansfromothertrash.Two-thirdsofCuritiba"sgarbageisrecycled,whichisgoodfortheenvironment.Andtheplantgiveshobstothepoorestpeople,whichimprovestheirlives.Duetocarefulplanning,Curitibadoesnothavethesametrafficproblemsthatmostcitieshave.Thestatisticsaresurprising.Thepopulationhasgrown—nowtwicethesizeitwasin1974—buttraffichasactuallydecreased30percent.Curitibaneededamass—transitsystembutcouldn"taffordanexpensivesubway.Cityplannersbegan,instead,withanunusualsystemofbusesinthecentrelanesoffivewidemajorstreets.Ateachbusstop,thereisaforty-foot-longglasstube.Passengerspaybeforetheyenterthetube.Thentheygetonthebus"subwaystyle"—throughwidedoors.Thisallowspeopletogetonandoffthebusquicklyandefficiently.Peopledon"tcrowdontothebus;loadingandunloadingtakesonlythirtyseconds.Thismakescommutingmorepleasantandalsohelpstosolvetheproblemofairpollution.Thenthereistheproblemofstreetchildren.Tohelpsolvethisproblem,JaimeLernertalkedseriouslywithownersoffactoriesandstores.Eachfactoryandstoreowneragreedtotakecareofafewstreetchildren—togivethemamealeverydayandasmallamountofmoney.Inexchange,thechildrendosmall,simplejobsinthegardenoroffice.Inaddition,thecityhiredteenagerstokeepthepublicparksclean.Clearly,overcrowdinginbigcitiesworldwideisthecauseofseriousproblems.However,theexampleofCuritibaprovideshopethatcarefulplanningandcreativethinkingcanleadtosolutionstomanyofthem.Curitibaistruly,asLewisMumfordoncesaidofcitiesingeneral,a"symbolofthepossible".Completethesummarybelowwithinformationfromthepassage,usingnomorethanthreewordsforeachblank.There"sgoodnewsandbadnewsaboutlifeinmoderncities.Researchershaveestimatedthatthe1willbemorethan8billion.4billionofthesepeoplewillbelivingincitiesindevelopingcountriessuchasIndiaandNigeria.Itwillcause2.Bytheyear2025,withbigpopulationlivinginIndiancities,peoplewillfaceproblemsofairpollution,diseaseandcrime.Thegoodnewsisthatinsomecities,urbanlifeisactuallygettingmuchbetter.Curitibaprovesthatitispossibleforacityindevelopingcountriestooffergoodlifetoitsresidents.ThemayorofCuritiba,JaimeLerner,hascomeupwithlotsofsolutionstoproblemsaheadofCuritiba.Onecreativesolutionisthemethodof3.Peoplebringtheirtrashtospecialcentresandexchangeitforsomethinguseful.Thetrashisthenrecycledandputtouseagain.Besides,Curitiba"scityplannersinstallaforty-foot-longglasstubeateachbusstopforpassengerstopaythefarebeforegettingonthebus.Thisnotonlysavestimebutalsohelpstoreduce4.JaimeLerneralsomakesefforttohelpstreetchildren.Heaskstheownersoffactoriesandstorestoallowthesechildrentodosimplejobsinexchangefor5orsomemoney.Inaddition,thecityhiresthemtokeepthepublicparksclean.

填空题Whichofthenumbersinthesquareistheoddoneout?

填空题Proofread the passage as required. Each indicated line contains a maximum of one error. Correct the passage in the following way: for a correct line, put the sign "√" in the corresponding blank; for a wrong word, underline the wrong word and write the correct one in the blank; for a missing word, mark the position of the missing word with the sign "∧" and write the word you believe to be missing in the blank; for an unnecessary word, cross the unnecessary word with the sign "—" and put the word with the sign "—" in the blank. Write the answers on the answer sheet. Chemistry is the study of the behavior and composition of matter. All foods aremade up of chemical substance which undergoes chemical changes when cooking 82. ______in an oven or digested within the body. The cooking of meat and vegetables induce 83. ______chemical changes, making it more delicious; similarly the leavening action of 84. ______baking powder is a straightforward chemical change, as is the conversion ofstarch into sweet sugars by digestion. Cookery is a science requiring a knowledge of chemistry. 85. ______This is evident from the variety of cooking products and food additives availableas cooking oils, fats, colorings, sweeteners, tenderizers, flavorings, screamingagents, preservatives, etc. Each is carefully prepared before painstaking 86. ______research. It is therefore essential for trained cookers to understand 87. ______chemical science in order to appreciate the chemistry nature of foods 88. ______and the changes achieving on cooking. Homeworkers should also 89. ______know cleansing agents and textiles used in the home and how the latter 90. ______responds to the effects of heat, light, water, and chemical cleansing agents. 91. ______

填空题Fill in each blank in no more than three words to complete the sentences according to the passage.