Don't you have any good news?
No. Yesterday I had to stay after school, because I was talking during my biology class.
You'd better keep quiet in class.
Sometimes I do. The day before yesterday, I was very quiet during my history class and I still had to stay after class.
I don't understand.
Because I fell asleep during the class, but it wasn't my fault. The lesson was very dull.
I advise you to take school more seriously. If you don't pass your exam, you'll have to drop out and work as a result.
I don't think that it makes much difference. If I have a job, I have to do dull work every day, but if I'm in school, I must listen to dull teachers every day.