Middle school students in America hear about twenty bells every day. The first bell is the tardy(迟到的)bell. If the tardy bell rings but students are not in their seats (座位), they know they are late. Another bell rings at the end of each class. Everyone leaves the classroom quickly and plays for ten minutes. Then the bell rings and they go to the next class.

When students have a hard class, they are often happy to hear the bell ring. If the class is interesting, they do not want the bell to ring. Most students like the lunch bell best, because it is time to join their friends for lunch. They buy some food in the school dining hall or they bring their lunch from home.

After a nice lunch, another bell is coming soon(不久), and then another bell…

One day, a woman took a bus with her son. The boy was about four years old. He ran on the bus and1up and down on the seat. There was a man next to2 . When he saw it, he was a little 3and told the boy not to run or jump, 4it was very dangerous and it was also impolite (不礼貌的). But the5said, "He is just a little kid. We shouldn't be so strict with a 6. "The man said to the woman, "7 we don't teach the kids now, they will not follow the8in the future."

Do you agree with the woman or the man? At9we have family rules. For example (例如), we can't10 on school nights. In the school, we also have 11rules. We can't listen to music in the classroom. We12eat in the classroom. We must wear uniforms 13 Monday to Friday. Parents and schools are sometimes strict, but remember, they make rules to help 14. We must 15 these rules.