模拟试题一第二节：完形填空（共20小题：每小题1分，满分20分）阅读下面短文，掌握其大意，然后从36-55各题所给的四个选项（A、B、C和D）中，选出最佳选项。Youhavewaited45minutesforthevaluable10minutes'breakbetweenclasses.Butwhenthebellforthenextclassrings,youcan't36howquicklytimehaspassed.Ifyouarefamiliarwiththis37,you'llknowhowtimeflieswhenyouarehavingfun-and38whenyouarebored.Nowscientistshave39areasonwhythisisthecase.Scanshaveshownthatpatternsofactivityinthebrain40accordingtohowwefocusonatask.Whenweare41,weconcentratemoreonhowtimeispassing.Andthismakesourbrains42theclockistickingmoreslowly.Inanexperiment43byaFrenchlaboratory,12volunteerswatchedanimage44researchersmonitoredtheirbrainactivity.Thevolunteersweretoldto45concentrateonhowlonganimageappearedfor,then46thecoloroftheimage,andthirdly,studybothdurationandcolor.Theresultsshowedthat47wasmoreactivewhenthevolunteerspaid48subjects.Itisthoughtthatifthebrainis49focusingonmanyaspectsofatask,ithasto50itsresources,andpayslessattentiontotheclock.51,timepasseswithoutusreally52it,andseemstogoquickly.Ifthebrainisnotsoactive,itconcentratesits53energiesonmonitoringthepassingoftime.54,timeseemstodrag.Nexttimeyoufeelbored55,perhapsyoushouldpaymoreattentiontowhattheteacherissaying!36．A．guessB．learnC．believeD．doubt37．A．viewB．pointC．sceneD．experience38．A．dragsB．stopsC．backsD．gains39．A．thoughtoverB．madeupC．suggestedD．comeupwith40．A．changeB．developC．growD．slow41．A．sleepyB．boredC．excitedD．active42．A．reportB．thinkC．decideD．see43．A．producedB．carriedC．triedD．performed44．A．soB．whenC．whileD．but45．A．partlyB．quicklyC．howD．first46．A．rememberB．focusonC．forgetD．tellapart47．A．theresearchersB．theexperimentC．theclockD．thebrain48．A．muchattentiontoB．moreattentiontoC．attentiontomanyD．attentiontomore49．A．busyB．likelyC．readyD．sure50．A．focusB．gatherC．reachD．spread51．A．HoweverB．FurthermoreC．ThereforeD．Finally52．A．recognizingB．watching