参考答案:
1. It's my first day at school.
2. This is a great school, but there are a lot of rules.
3. We can't be late for class. This is very important.
4. We have to be quiet in the library.
5. My dad says I can't play basketball after school because I must do my homework.
6. Remember, they make rules to help us. We have to follow them.
7. I am not happy because there are too many rules at home.