◎ 题干
People plant _______ every year.

A. millions trees
B. millions of trees
C. million of tree
D. million of trees
◎ 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“People plant_______ every year. [ ]A. millions trees B. millions of trees C. million of tree D. million of trees …”主要考查了你对  【可数名词(单数名词,复数名词)】【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。