根据短文内容，将所给的词的恰当形式填入填在横线上

    Anna visited some children last year. The children didn't have homes. She (want) to help them. She (tell) her idea to her teacher. With the teacher's help, Anna and her classmates (had) birthday parties for the children. "When the children (be) happy at the birthday parties, I'm very happy too," (say) Anna.