21.This light shelf is strong enough to _______ all the books here.

　　A.wipe

　　B.wax

　　C.survey

　　D.sustain

　　22.The _______ Court is the highest court in the United States.

　　A.Vital

　　B.Thunder

　　C.Reverse

　　D.Supreme

　　23.Our university has an international student exchange _______ with the University of Wyoming in the United States.

　　A.procession

　　B.provision

　　C.profession

　　D.program

　　24.He ________ of me the best way to go.

　　A.investigated

　　B.inquired

　　C.frightened

　　D.resorted

　　25.Mr.White tried to _______ this job through the influence of his father.

　　A.harness

　　B.fetch

　　C.curse

　　D.obtain

　　26.The police dog finally found the _______ of the prisoners of war.

　　A.steep

　　B.resolution

　　C.porter

　　D.trail

　　27.As the only _______ in the small village, he not only fixed the furniture but also made furniture for the villagers.

　　A.symbol

　　B.source

　　C.pan

　　D.carpenter

　　28.A big crowd gathered around the bus, almost _______ the traffic.

　　A.affecting

　　B.blocking

　　C.creating

　　D.mating

　　29.As far as I see, this book has its own _______.

　　A.merit

　　B.signal

　　C.visible

　　D.swift

　　30.This tree is too _______ to be planted in this area.

　　A.tremendous

　　B.vigorous

　　C.shy

　　D.tender