We have twenty minutes' rest between classes. Look! Most of us are playing during the rest time. Some students are on the playground. They are having a basketball game. Oh! A boy is running with a ball. And another is trying (尽力) to stop him. They are so cool. And there are some girls watching the game. Some students are in the classroom. They are talking. A few of them are reading or doing homework. Look! A girl is looking at the birds in a tree in front of the classroom. She must be thinking of something interesting because she is smiling (微笑).

    What are the teachers doing? Do you know? Some of them are working in the office, and some are talking with students. Everyone is busy with his or her things. How busy and happy they are!