◎ 题干

13. The voyage diaries were handed down by his great grandfather, so their brothers have kept them as ____ .
A.the apple in their eyesB.the apple of their mouths
C.the apple of their eyesD.an apple of their eyes
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◎ 知识点
    根据n多题专家分析,试题“13. The voyage diaries were handed down by his great grandfather, so their brothers have kept them as ____ .A.the apple in their eyesB.the apple of their mouth…”主要考查了你对  【可数名词及其单复数】【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。