輔導(dǎo)：詞匯擴(kuò)充+語(yǔ)法訓(xùn)練exercise2

詞匯擴(kuò)充+語(yǔ)法訓(xùn)練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.