Ifasubstanceisdissolvedinwaterorheated，itmay（）agas.

Thecountry’schiefexportsarecoal,carsandcottongoods,cars_____themostimportantofthese.

_____enoughtimeandmoney,theresearcherswouldhavebeenabletodiscovermoreinthisfield.

Theteachers’union_________alawsuitagainstthedistrictcallingforrepairing“deplorable”schoolconditions.

TEXTD

Personalityis，tolargeextent,inherent--A-typeparentsusuallybringaboutA-typeoffspring.Butthe

environmentmustalsohaveaprofoundeffect,sinceifcompetitionisimprotanttotheparents,itislikelytobecomeamajorfactorlivesoftheirchildren.OneplacewherechildrensoakupAcharacteristicsisschool,whichis,byitsverynature,ahighlycompetitiveinstitution.Toomanyschoolsadoptthe"winatallcosts"moralstandardandmeasuretheirsuccessbysportingachievements.Thecurrentpassionformakingchildrencompeteagainsttheirclassmatesoragainsttheclockproducesatwo-layersystem,inwhichcompetitiveAtypesseeminsomewaybetterthantheirB-typefellows.Beingtookeentowincanhavedangerousconsequences:rememberthatPheidippides,thefirstmarathonrunner,droppeddeadsecondsaftersaying:"Rejoice,weconquer!".Byfartheworstformofcompetitioninschoolisthedisproportionateemphasisonexaminations.Itisarareschoolthatallowspupilstoconcentrateonthosethingstheydowell.Themeritsofcompetitionbyexaminationaresomewhatquestionable,butcompetitioninthecertainknowledgeoffailureispositivelyharmful.Obviously,itisneitherpracticalnordesirablethatallAyoungsterschangeinto'B's.Thewouldneedstypes,andschoolshaveanimportantdutytotrytofitachild'spersonalitytohispossiblefutureemployment.Itistopmanagement.16.Accordingtotheauthor,whatfactorscontributetothebuildingofpersonality?

A.inheritance

b.inheritance,competitionandenvironment

c.competition

d.environment

17.Whichofthefollowingstatementsisnottrueaccordingtotheauthorofthepassage?

A.Schoolsusuallyadoptseverecompetitivepolicies.

B.Studentsareoftendividedbycompetitionresults.

C.Schoolisplacewherechildrencultivatetheircharacteristics.

D.Thestrongerdesireforwinning,thebetter.

18.Thephrase"soakup"isclosestinmeaningto____.

A.pullup

b.takeup

c.takein

d.pullin

19.Whatattitudedoestheauthorholdtowardexaminationsinschools?

A.positive

b.negative

c.doubtful

d.neutral

20.whatsuggestiondoestheauthormakeconcerningthemanagementofschools?

A.AllstudentsbemadeintocompetitiveAtypes.

B.Achild'spersonalitybeconsideredinregardtohispossiblefuturejob.

C.AllstudentsbechangedintoBcharacteristics.

D.Schoolsabolishallformsofexaminations.