全国英语等级考试四级模拟试题完型填空

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1、http://bj.xdf.cn完型填空模拟试题Passage1Thefirstandsmallestunitthatcanbediscussedinrelationtolanguageistheword.Inspeaking,thechoiceofwordsis41theutmostimportance.Properselectionwilleliminateonesourceof42breakdowninthecommunicationcycle.Toooften,carelessuseofwords43ameetingofthemindsofthespeakerandlistener.

2、Thewordsusedbythespeakermay44unfavorablereactionsinthelistener45interferewithhiscomprehension;hence,thetransmission-receptionsystembreaksdown.46inaccurateorindefinitewordsmaymake47difficultforthelistenertounderstandthe48whichisbeingtransmittedtohim.Thespeakerwhodoesnothavespecificwordsinhisworkingv

3、ocabularymaybe49toexplainordescribeina50thatcanbeunderstoodbyhislisteners.41［A］of［B］at［C］for［D］on 42［A］inaccessible［B］timely［C］likely［D］invalid 43［A］encourages［B］prevents［C］destroy［D］offers 44［A］passout［B］takeaway［C］backup［D］stirup 45［A］who［B］as［C］which［D］what 46［A］Moreover［B］However［C］Prelim

4、inarily［D］Unexpectedly 47［A］that［B］it［C］so［D］this 48［A］speech［B］sense［C］message［D］meaning 49［A］obscure［B］difficult［C］impossible［D］unable50［A］case［B］means［C］method［D］way1http://bj.xdf.cnPassage2Sleepisdividedintoperiodsofso-calledREMsleep,characterizedbyrapideyemovementsanddreaming,andlongerperi

5、odsofnon-REMsleep.41kindofsleepisatallwellunderstood,butREMsleepis42toservesomerestorativefunctionofthebrain.Thepurposeofnon-REMsleepisevenmore43.Thenewexperiments,suchasthese44forthefirsttimeatarecentmeetingoftheSocietyforSleepResearchinMinneapolis,suggestfascinatingexplanations45ofnon-REMsleep.F

6、orexample,ithaslongbeenknownthattotalsleep46is100percentfataltorats,yet,47examinationofthedeadbodies,theanimalslookcompletelynormal.Aresearcherhasnow48themysteryofwhytheanimalsdie.Therats49bacterialinfectionsoftheblood,50theirimmunesystems—theself—protectingmechanismagainstdiseases—hadcrashed.41［A

7、］Either［B］Neither［C］Each［D］Any 42［A］intended［B］required［C］assumed［D］inferred 43［A］subtle［B］obvious［C］mysterious［D］doubtful 44［A］maintained［B］described［C］settled［D］afforded 45［A］inthelight［B］byvirtue［C］w