◎ 题干
—Excuse me. Where is Mr Smith's office?
—It's on ______ floor.
[     ]
A. six
B. the six
C. the sixth
D. sixth
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“—Excuse me. Where is Mr Smith's office?—It's on ______ floor. [ ]A. six B. the sixC. the sixth D. sixth …”主要考查了你对  【序数词】  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。