阅读下面短文，并用英语回答问题(请注意后面每小题的词数要求)

We have twenty minutes' rest between classes. Look! Most of us are playing during the rest time. 16 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 5 girls watching the game. Seven 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 be-cause she is .smiling(微笑).

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