◎ 题干
The earth  is              years old.

A. four thousands six hundreds
B. four thousand six hundred
C. four thousand and six hundred million
D. four thousand six hundred millions
◎ 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“The earthisyears old. [ ]A. four thousands six hundreds B. four thousand six hundred C. four thousand and six hundred million D. four thousand six hundred m…”主要考查了你对  【基数词】  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。