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    精英家教网 > 高中英语 > 题目详情
    Only by ______ your attention ______ what you are learning can you learn it well.
    A．focus；on
    B．pay；on
    C．focusing；on
    D．paying；on
    C
    by是介词，后面用动名词形式。句意：只有把精力集中在你所学的东西上，你才能学好它。focus...on...“把……集中在……上”，固定短语。
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