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