用所给单词的正确形式填空

    Last Sunday, I (go) to a shopping center with my mum and dad. We (see) a small boy on the floor. He (look) sad. We (go) to him and (help) him up. I (ask) him, “Are you OK?” He (say),”I can't find my mum.” Dad (take) him to an office in the shopping center. I (give) him a sweet. The small boy (become) happy. I (be) happy too.