A: Any good news?
B: Not really.     So I was left behind after school yesterday.
A:     
B: Sometimes I do. The day before yesterday, I was quiet in my history class but I still had to stay after school.
A:     
B: Because I fell asleep. But it wasn’t my fault.    
A: I advise you to take school more seriously. If you don’t pass your exam, you will have to drop out and work as a result;
B:     If I have a job, I have to do dull work every day. But now I am in school, I must listen to dull teachers every day.
A: Something must be wrong with you. Go to the psychologist first.

A．You are lazy. B．I don’t understand. C．You made your teacher angry. D．Better keep quiet in class. E．The lesson is dull. F．I don’t think it makes much difference. G．I was talking without being asked in class.