◎ 题干
Sally is a middle school girl. She is in Class 6, Grade 7. How old is she?
[     ]
A. The thirteen.
B. Thirteenth.  
C. Thirty.
D. Thirteen.
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“--Sally is a middle school girl. She is in Class 6, Grade 7. How old is she? --______[ ]A. The thirteen. B. Thirteenth.C. Thirty. D. Thirteen. …”主要考查了你对  【基数词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。