My summer holiday was fun. (对画线部分提问)

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【答案】How was your summer holiday?

【解析】

原句句意：我的暑假很有趣。对情况提问，用疑问词how，因为有be动词was，所以变为特殊疑问句时将其提致主语前面，该特殊疑问句结构为：特殊疑问词 + was +主语？故答案为How was your summer holiday?