◎ 题干
______ young trees have been planted along the north of China these years.

A. Million of
B. Millions of
C. Several millions
D. 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“______ young trees have been planted along the north of China these years. [ ]A. Million of B. Millions ofC. Several millions D. Millions …”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。