◎ 题干
To plant a tree,we must dig_________ .
A.a three feet deep hole
B.three-foot deep a hole
C.a hole three feet deep
D.a three-feet-deep hole
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“To plant a tree,we must dig_________ .A.a three feet deep holeB.three-foot deep a holeC.a hole three feet deepD.a three-feet-deep hole…”主要考查了你对  【序数词】【小数】【分数】【量词】  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。