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    2．Too much rain will do harmto the crops．

    分析 雨水过多会对庄稼不利．

    解答 答案：to
    解析：根据句意及横线前面的英文提示可知，本题考查do harm to"对…不利/有害"这一固定短语．综上，本题答案为：to．

    点评 本题考查单词填空，做此类题目时一定要分析句子结构，根据固定搭配或者是句意再结合所给提示确定最终答案．

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