填空题 Luke knocked over the old lady's bicycle by accident. mean Luke ____________________ knock over the old lady's bicycle.
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【正确答案】 1、didn't mean to    
【答案解析】句中by accident为“偶然”之意，而mean to do sth．是“企图做某事”，didn't　mean to do是“不是故意地做了某事”。