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    【题目】Unluckily, not everyone has realized the important role the balance of nature _______ in their daily life.

    A.makesB.playsC.actsD.does

    【答案】B

    【解析】

    考查动词辨析。句意：不幸的是，并不是每个人都意识到自然平衡在日常生活中的重要作用。play an important role in为固定用法，意为“在…当中起重要作用”。根据句意，故选B。

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