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    【题目】Obesity is ________ major concern for public health officials and also may affect ________ test scores of students.

    A. a; /B. a; aC. the; / D. the; the

    【答案】A

    【解析】

    试题分析：考查冠词。句意：肥胖是公共卫生官员的一个主要关注，也可能影响学生的测试分数。第一空表示泛指，用不定冠词；第二空后是名词复数形式，不用冠词，故选A。

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