◎ 题干
---What’s made Ruth so upset?
--- ______ three tickets to the folk music concert.
A.LostB.LosingC.Because of losingD.Since she lost
◎ 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“---What’s made Ruth so upset?--- ______ three tickets to the folk music concert.A.LostB.LosingC.Because of losingD.Since she lost…”主要考查了你对  【现在分词的被动式】【现在分词】【不定式的被动式】【过去分词】  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。