题目内容：

阅读下列短文，根据短文内容填空，在未给提示词的空白处仅填写 1 个适当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。

Eventually, I decided to follow her and 1. happened truly amazed me. She was taking the food to the refugee camp, 2. she distributed it to children. I asked around and found out that my mum was very well known in the area. The kids were very 3. (friend) with her and even looked up to her as if she were their own mothers. Then it hit me – why would she not want to tell me about what she 4. (do) ?