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    精英家教网 > 高中英语 > 题目详情

    People in developed countries are supposed ____ more healthy food before than what they have today.
    A．to be hadB．to haveC．hadD．to have had
    D
    考查非谓语动词。句意：发达国家的人们以前应该享有便现在更健康的食品。不定式表示具体的动作，如果动作发生在谓语动词之前，则要用完成时态的不定式，故选D。
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