(22)
A.preconception
B.knowledge
C.understanding
D.feeling

(23)
A.adequate
B.unknown
C.inexplicable
D.primary

(24)
A.going
B.leaving
C.coming
D.getting

(25)
A.more
B.rather
C.less
D.better

(3- popular) ______
A.popularity
B.popularization
C.popularizer
D.population

(26)
A.find
B.founded
C.be found
D.found

(28)
A.China
B.Egypt
C.England
D.America

(30)
A.knowledge
B.know
C.known
D.knowledgeable

(4-require)____
A.requisition
B.required
C.requirement
D.requisite

(3)
A.exchanged
B.changed
C.transferred
D.converted