◎ 题干
—Do you know the boy _____ is sitting next to Peter?
—Yes. He is Peter's friend. They are celebrating his _____ birthday.

[     ]

A. who; ninth
B. that; nineth
C. /; nineth
D. which; ninth
◎ 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“—Do you know the boy _____ is sitting next to Peter? —Yes. He is Peter's friend. They are celebrating his _____ birthday. [ ]A. who; ninth B. that; nine…”主要考查了你对  【序数词】【关系代词】【定语从句】  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。