Higher-income parents tended to have children play with puzzles more
frequently
frequently
（frequent），and both boys and girls who played with puzzles had better spatial skills.

【答案】frequently

【解答】

【点评】

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发布：2024/4/20 14:35:0组卷：0引用：1难度：0.7

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Higher-income parents tended to have children play with puzzles more frequentlyfrequently（frequent），and both boys and girls who played with puzzles had better spatial skills.