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    【题目】A healthy diet and adequate physical exercises are the keys ______ a better life.

    A.of havingB.to haveC.for havingD.to having

    【答案】D

    【解析】

    考查固定搭配。句意：健康的饮食和适当的体育锻炼是拥有更好生活的关键。固定搭配：the key to sth./doing sth.“某事或做某事的关键”，此处to是介词，后面用动名词作宾语。故选D。

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