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    精英家教网 > 高中英语 > 题目详情
    Great efforts to increase grain production       if food shortages are to be avoided.
    A．could be madeB．must be made
    C．might be madeD．would be made
    B
    考查情态动词的用法。句意“如果要避免食物短缺，就必须尽最大努力来提高谷物产量。”make great efforts to do sth.“尽很大努力做某事”；could和might意为“可以”，语气不强，must表示“必须”。故选B。
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