Get on the bus and write a composition with 400 words less.

On a sunny Sunday, my mother and I went shopping happily.

Take bus 107 to the mall. We waited for a long time on the platform, and the bus finally came! I paid the money and ran to the car as fast as I could. How many people are riding today! There are only three seats left. My mother, I and a little sister have taken the empty seats.

When I was sitting in the car, I thought, "Our city is really beautiful!" While I was looking at the beautiful scenery outside the window, the bus stopped again. No one got on the bus this time, but a white-haired grandmother got on the bus. Grandma has white hair and looks over 60 years old. She got on the bus with a bag of vegetables in one hand and a cane in the other. But there are no empty seats in the car. I hesitate to give up my seat. If I give up my seat, I will always stand, but if I don't, my grandmother will always stand. Just when I was thinking, a sweet voice interrupted my train of thought. I saw a little sister stand up from her seat and say, "Grandma, please sit down!" " "Grandma said gratefully," Thank you, little friend. " "You're welcome, this is what I should do." Little sister's face showed a smile, and grandma's kind face also showed a grateful smile. The passengers looked at each other approvingly like little sisters. My face has a fever. My sister and I are both young pioneers. My little sister is younger than me, but she gave her seat to her grandmother. I'm really ashamed of this senior. However, I understand a truth: people should care about each other, so that we can feel sweet and warm in each other's hearts!