根据n多题专家分析，试题“He ____ have a sister, but he ____ a brother. [ ]A. don't, have B. doesn't, have C. don't, has D. doesn't, has …”主要考查了你对 【实义动词的单数第三人称形式】，【助动词的单数第三人称形式】 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。
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