◎ 题干
There are __________ units in Book Ⅲ. The __________ unit is the most interesting.
[     ]
A. nineteen; ninth    
B. ninteen; ninth
C. nineteen; nineth
D. ninteen; nineth
◎ 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“There are __________ units in Book Ⅲ. The __________ unit is the most interesting. [ ]A. nineteen; ninth B. ninteen; ninth C. nineteen; nineth D. nintee…”主要考查了你对  【基数词】【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。