If a substance is dissolved in water or heated ， it may （）a gas.

_____ regular training in nursing, she could hardly cope with the work at first.

TEXTC

Therearetwofactorswhichdetermineanindividual'sintelligence.Thefirstisthesortofbrainheisbornwith.

Humanbrainsdifferconsiderably,somebeingmorecapablethanothers.Butnomatterhowgoodabrainhehas

tobeginwith,anindividualwillhavealoworderofintelligenceunlesshehasopportunitiestolearn.Sothe

secondfactoriswhathappenstotheindividual—thesortofenvironmentinwhichheisbroughtup.Ifan

individualishandicapped(不利)environmentally,itislikelythathisbrainwillfailtodevelopandhewillnever

attainthelevelofintelligenceofwhichheiscapable.Theimportanceofenvironmentindetermininganindividual'sintelligencecanbedemonstratedbythecasehistoryoftheidenticaltwins,PeterandMark.Beingidentical,thetwinshadidenticalbrainsatbirth,andtheirgrowthprocesseswerethesame.Whenthetwinswerethreemonthsold,theirparentsdied,andtheywere

placedinseparatefoster(抚养)homes.Peterwasraisedbyparentsoflowintelligenceinanisolatedcommunity

withpooreducationalopportunities.Markwasrearedinthehomeofwell-to-doparentswhohadbeentocollege.Hewasreadtoasachild,senttogoodschools,andgiveneveryopportunitytobestimulated

intellectually.Thisenvironmentaldifferencecontinueduntilthetwinswereintheirlateteens,whentheywere

giventeststomeasuretheirintelligence.Mark'sI.Q.was125,twenty-fivepointshigherthantheaverageand

fullyfortypointshigherthanhisidenticalbrother.Givenequalopportunities,thetwins,havingidenticalbrains,

wouldhavetestedatroughlythesamelevel.

11.Thisselectioncanbestbetitled____________.

A.MeasuringYourIntelligence

B.IntelligenceandEnvironment

C.TheCaseofPeterandMark

D.HowtheBrainInfluencesIntelligence

12.Thebeststatementofthemainideaofthispassageisthat_______.

A.humanbrainsdifferconsiderably

B.thebrainapersonisbornwithisimportantindetermininghisintelligence

C.environmentiscrucialindeterminingaperson'sintelligence

D.personshavingidenticalbrainswillhaveroughlythesameintelligence

13.Accordingtothepassage,theaverageI.Q.is_______.

A.85.B.100C.110D.125

14.Thecasehistoryofthetwinsappearstosupporttheconclusionthat_______.

A.individualswithidenticalbrainsseldomtestatthesamelevelB.anindividual'sintelligenceisdeterminedonlybyhisenvironment

C.lackofopportunityblocksthegrowthofintelligence

D.changesofenvironmentproducechangesinthestructureofthebrain

15.Thispassagesuggeststhatanindividual'sI.Q._______.

A.canbepredictedatbirth

B.staysthesamethroughouthislife

C.canbeincreasedbyeducation

D.isdeterminedbyhischildhood

My mother was determined to help those in need and she would have been immensely proud of what has been achieved these last 20 years. The italicized part in the sentence expresses _______.

Hesetupinbusiness（）hisownandwasverysuccessful.