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    精英家教网 > 高中英语 > 题目详情
    As we all know, _________ exercise will help to strengthen the heart and improve circulation of the blood.
    A．normalB．averageC．regularD．ordinary
    C
    句意：众所周知，定期的锻炼有助于增强心脏，促进血液循环。 regular 定期的，有规律的。故选C。
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