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    7．Medical experts have suspected for many yeas           there is a strong link between      a person eats and cancer．（　　）
    A．that； thatB．不填；thatC．what； 不填D．that； what

    分析 医疗专家多年来一直怀疑一个人的饮食和癌症之间有密切的关系．

    解答 答案：D
    题干中a person eats是作介词between的宾语从句，从句中eat缺少宾语，要用连接代词what；there is a strong link是作suspected的宾语从句，表达怀疑的内容，从句结构完整，要用从属连词that连接．故选D．

    点评 在句子中起名词作用的各种从句统称为名词性从句．根据它们在句中的语法作用，这类从句又可分为主语从句、同位语从句、表语从句和宾语从句．

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