◎ 题干
  You’ve been so kind to us that we will always be deeply _____.
A.out of debtB.in your debtC.in troubleD.in danger
◎ 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“ You’ve been so kind to us that we will always be deeply _____.A.out of debtB.in your debtC.in troubleD.in danger…”主要考查了你对  【介词和介词短语】  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。