◎ 题干
These toys are not suitable for children _____ four years old, who are too young.
[     ]
A. outside
B. beyond
C. under
D. within
◎ 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“These toys are not suitable for children _____ four years old, who are too young. [ ]A. outside B. beyond C. under D. within …”主要考查了你对  【介词和介词短语】  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。