A.altered
B.alternated
C.substituted
D.exchanged
A.certified
B.classified
C.clarified
D.notified
A.Because they dislike the scholastic knowledge.
B.Because they don't believe in each other.
C.Because they don't feel suited for their schools.
D.Because most of them did badly in schools.
A.to provide support for his argument
B.to illustrate the strong will of some gifted children
C.to explain how dull students can also be successful
D.to show how poor Oliver's performance was at school