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    20．When you are faced with challenges，try not to let discouraging thoughts _____．Be confident and trust yourself，and you'll make it．（　　）
    A．take onB．take upC．take inD．take over

    分析 当你面对挑战的时候，尽力不要让令人灰心的想法控制你． 有信心并且相信自己，你会成功的．

    解答 答案是D．本题考查动词短语辨析．A项表示"呈现；承担"；B项表示"占据（时间、空间）；开始从事"；C项表示"吸收；理解；欺骗'"；D项表示"接管；控制"；根据句意，不要让灰心的想法"控制"你，所以答案选择D项，其它选项不符合逻辑．

    点评 本题考查动词短语辨析，考生在平时的学习中应注意积累相应的动词短语，牢记其意思．在做题时，将词义和题干相结合，从语法、句子结构尤其是句意上去判断，句意通顺，符合逻辑，即正确答案．

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