阅读短文，回答问题。

    I'm Kate. My mother and I want to buy some things. So we go to the supermarket by car. In the supermarket, we can see many food and school things (学习用品). We buy eggs, sugar, milk and butter for my mother. And also, we buy paints, paper, glue and socks for school. But I think socks are not for school.

    On the way home, we stop the car. Because the traffic light is red. “Look! It's green now! Let's go!”Then we get home.