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　　21.Foreverycoursethathefollowsastudentisgivenagrade，whichisrecorded，andtherecordisavailableforthestudenttoshowtoprospectiveemployers.
　　22.Allthisimposesaconstantpressureandstrainofwork，butinspiteofthissomestudentsstillfindtimeforgreatactivityinstudentaffairs.
　　23.Theeffectiveworkofmaintainingdisciplineisusuallyperformedbystudentswhoadvisetheacademicauthorities.
　　24.Muchfamilyquarrellingendswhenhusbandsandwivesrealizewhattheseenergycyclesmean，andwhichcycleeachmemberofthefamilyhas.
　　25.Wheneverpossible，doroutineworkintheafternoonandsavetasksrequiringmoreenergyorconcentrationforyoursharperhours.
　　26.Wealsovaluepersonalqualitiesandsocialskills，andwefindthatmixed-abilityteachingcontributestoalltheseaspectsoflearning.
　　27.Theyalsolearnhowtocopewithpersonalproblemsaswellaslearninghowtothink，tomakedecisions，toanalyseandevaluate，andtocommunicateeffectively.
　　28.Theproblemis，howtoencourageachildtoexpresshimselffreelyandconfidentlyinwritingwithoutholdinghimbackwiththecomplexitiesofspelling？
　　29.Itmayhavebeenasharpcriticismofthepupil’stechnicalabilitiesinwriting，butitwasalsoasadreflectionontheteacherwhohadomittedtoreadtheessay，whichcontainedsomebeautifulexpressionsofthechild’sdeepfeelings.
　　30.Theteacherwasnotwrongtodrawattentiontotheerrors，butifhisprioritieshadcentredonthechild’sideas，anexpressionofhisdisappointmentwiththepresentationwouldhavegiventhepupilmoremotivationtoseekimprovement.
　　31.Giventhenatureofgovernmentandprivateemployers，itseemsmostlikelythatdiscriminationbyprivateemployerswouldbegreater.
　　32.Thereleaseofthecarboninthesecompoundsforrecyclingdependsalmostentirelyontheactionofbothaerobicandanaerobicbacteriaandcertaintypesoffungi.
　　33.Aspiriteddiscussionspringsupbetweenayounggirlwhosaysthatwomenhaveoutgrownthejumping-on-a-chair-at-the-sight-of-amouseeraandamajorwhosaysthattheyhaven’t.
　　34.Theyaretryingtofindoutwhetherthereissomethingaboutthewayweteachlanguagetochildrenwhichinfactpreventschildrenfromlearningsooner.
　　35.Mathematicianswhohavetriedtousethecomputerstocopythewaythebrainworkshavefoundthatevenusingthelatestelectronicequipmenttheywouldhavetobuildacomputerwhichweighedover10，000kilos.
　　36.Sincedifferentpeopleliketodosomanydifferentthingsintheirsparetime，wecouldmakealonglistofhobbies，takingineverythingfromcollectingmatchboxesandraisingrarefish，tolearningaboutthestarsandmakingmodelships.
　　37.Theyknowthatasealswimmingundertheicewillkeepabreathingholeopenbyitswarmbreath，sotheywillwaitbesidetheholeandkillit.
　　38.Wemaybeabletodecidewhethersomeoneiswhiteonlybyseeingiftheyhavenoneofthefeaturesthatwouldmarkthemclearlyasamemberofanotherrace.
　　39.Althoughsignsofdishonestyinschool，businessandgovernmentseemmuchmorenumerousinyearsthaninthepast，coulditbethatwearegettingbetteratrevealingsuchdishonesty？
　　40.Itisnotquiteamatterofdisagreeingwiththetheoryofindependence，butofrejectingitsimplications：thattheromancesmaybetakeninanyornoparticularorder，thattheyhavenocumulativeeffect，andthattheyareasseparateastheworksofamodernnovelist.