◎ 题干
As a student, you need at least           sleep a day.
A.eight hours’s B.eight hour’s
C.eight hours’ D.eight hours
◎ 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“As a student, you need at least sleep a day.A.eight hours’sB.eight hour’sC.eight hours’D.eight hours…”主要考查了你对  【专有名词】【名词所有格】【集合名词】【名词】  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。