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    【题目】Reading English every day is _______________ for English learners.

    A. unhealthy B. serious C. necessary D. dangerous

    【答案】C

    【解析】句意：每天读英语对英语学习者来说很有必要。unhealthy不健康的；serious严重的；necessary必要的；dangerous危险的，结合句意可知选C。

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