1. Although he is very old, but he still exercises every day. 2. Because he is helpful, so he often helps others.
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◎ 解析
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◎ 知识点
根据魔方格专家分析，试题“改错。（在原句画线并改正错误）1.Although he is very old, but he still exercises every day.2.Because he is helpful, so he often helps others.______________ …”主要考查了你对 【从属连词】 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。
◎ 相似题
与“改错。（在原句画线并改正错误）1.Although he is very old, but he still exercises every day.2.Because he is helpful, so he often helps others.______________ ”考查相似的试题有：
