◎ 题干
David lives on the ________ floor. It is too high, so he has to take a lift every day.
A.fourty B.fourtieth C.forty D.fortieth
◎ 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“David lives on the ________ floor. It is too high, so he has to take a lift every day.A.fourtyB.fourtiethC.fortyD.fortieth…”主要考查了你对  【基数词】【序数词】【时刻】【分数】  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。