填空题____
填空题
____
参考解析
解析：
本段层次比较分明，主题句为第二句。选项B中“border-crossers”是对“The people who cross Fredonia’s borders”的同义转述，“Classification”对应句中的“categories”。
本段层次比较分明，主题句为第二句。选项B中“border-crossers”是对“The people who cross Fredonia’s borders”的同义转述，“Classification”对应句中的“categories”。
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