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    精英家教网 > 高中英语 > 题目详情
    Food shortage will long be a worldwide problem _______ much has been done to supply enough for everyone.?
    A．beforeB．if?
    C．sinceD．although?
    D?
    本题考查状语从句；虽然为满足每一个人的需求做了大量的工作，但食物缺乏仍然是一个长期的问题，所以选although。
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