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    精英家教网 > 高中英语 > 题目详情
    Taking regular exercise and eating a balanced diet are two important keys ________ good health.
    A．inB．from
    C．ofD．to
    D
    D 考察介词。句义：定期做运动和保持均衡的饮食是保持身体健康的两个关键点。Key意为关键，钥匙；后面接介词to，故答案为D。
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