◎ 题干
--- Lucy seems in low spirits.
--- Yes, all her efforts were ____ and no one was interested in her invention.
A.in needB.in vainC.in placeD.in use
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“--- Lucy seems in low spirits.--- Yes, all her efforts were ____ and no one was interested in her invention.A.in needB.in vainC.in placeD.in use…”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。