21.Thislightshelfisstrongenoughto_______allthebookshere.A.wipeB.waxC.surveyD.sustain

　　22.The_______CourtisthehighestcourtintheUnitedStates.

　　A.VitalB.ThunderC.ReverseD.Supreme

　　23.Ouruniversityhasaninternationalstudentexchange_______withtheUniversityof

　　WyomingintheUnitedStates.

　　A.processionB.provisionC.professionD.program

　　24.He________ofmethebestwaytogo.

　　A.investigatedB.inquiredC.frightenedD.resorted

　　25.Mr.Whitetriedto_______thisjobthroughtheinfluenceofhisfather.

　　A.harnessB.fetchC.curseD.obtain

　　26.Thepolicedogfinallyfoundthe_______oftheprisonersofwar.

　　A.steepB.resolutionC.porterD.trail

　　27.Astheonly_______inthesmallvillage,henotonlyfixedthefurniturebutalsomade

　　furnitureforthevillagers.

　　A.symbolB.sourceC.panD.carpenter

　　28.Abigcrowdgatheredaroundthebus,almost_______thetraffic.

　　A.affectingB.blockingC.creatingD.mating

　　29.AsfarasIsee,thisbookhasitsown_______.

　　A.meritB.signalC.visibleD.swift

　　30.Thistreeistoo_______tobeplantedinthisarea.

　　A.tremendousB.vigorousC.shyD.tender