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【答案】What does she like doing?

【解析】

划线部分是打篮球, 用疑问词What...doing, 句子剩余部分跟着What后面, 谓语动词是实义动词, 主语是第三人称单数, 一般疑问句用助动词does, 故答案为: What does she like doing？