◎ 题干
Although about ______ of the earth is covered with water, only a very small amount of it is drinkable.
[     ]
A. seven-tenth
B. seven tenths
C. seven-tenths
D. seven-tens
◎ 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“Although about ______ of the earth is covered with water, only a very small amount of it is drinkable. [ ]A. seven-tenth B. seven tenths C. seven-tenths D. …”主要考查了你对  【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。