Hanna is a 10-year-old little girl. She learned how to call 999 at1. She did what she learned well2she wanted to save people's lives when she grew up. She didn't3 very
long to save a person's life. Just a week later, her mother Michelle collapsed （晕倒） at home, and Hanna was very calm and did everything4. She knew every second is important.
The lady who 5the call stayed on the phone and told Hanna what to do.6what she had learned at school, Hanna moved Michelle to her side and tilted（倾斜） her head back to help keep her airway （气道）7. Hanna stayed calm, kept talking to her mum, and told her mum that she would be safe.
The doctors quickly8and took Michelle and Hanna to hospital. Michelle was so thankful that her daughter had known what to do. Hanna was just great. She knew what to do because she had9 how to call 999 at school, " Michelle said. Hanna's teacher Mrs Wood head shared, "It's a（n）10 that I think all children should know. They can help each other and help their family."
