词汇扩充 语法训练exercise2 Barbara McClintock’s systematic examination of corn demonstrated the transposition of genes, a finding that overturned entrenched beliefs and proved that ------- study may produce brilliant insights and ------- change. A.haphazard . . radical B.inherent . . controversial C.improvised . . startling D.methodical . . revolutionary E.derivative . . gradual Here s Why: Only “methodical study” and “revolutionary change” match the ideas of “systematic examination” and “overturned entrenched beliefs.”