Tony was a ten﹣year﹣old student. He went to school by himself, and he left school at fifteen o'clock every day. His parents were usually busy working and got home very late. So after school Tony walked to his grandma's house first every day. His grandma made dinner for him.
One afternoon Tony walked to his grandma's house. Usually, his grandma was in front of the door waiting for him. But today she wasn't there. When he reached the door, he found he couldn't find his key anywhere. "Oh, I lost my key, "he said to himself.
Tony rang the doorbell （门铃）, but no one came. Tony felt a little worried. He walked around the house and looked in every window. He found the window in the kitchen was open. So he climbed inside.
Tony found his grandma in her bedroom. She fell down and lay on the floor. Tony ran to call his father. Soon his dad came over and took Grandma to hospital.
A few hours later Grandma was safely home. Tony told her about his lost key. Grandma was happy that he found a way to help her. She smiled and told him she had two things for him. First, she gave Tony a new key. Then, she gave him a hug（拥抱） and told him how much she loved him. Tony thought to himself, "This must be how a hero feels. "
