同义句转换: He could walk when he was thirteen months old. He cou

学习时间:2026-08-24 22:36:34 阅读：5226

同义句转换: He could walk when he was thirteen months old. He could walk _____ _____ _____ _____.

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2026-08-24 22:36:34

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He could walk when he was thirteen months old。
=He could walk 【at thirteen months old】。