In the class group of the university, what I am most afraid of is that the instructor suddenly sends a message asking you to go to a certain classroom for a meeting. It's really terrible, because sometimes I don't participate in the student union when I am a freshman, so when I am in class. I usually do some work in the student union and probably take part in some activities, so I'm not at school. I may take part in some volunteer activities outside the school, because they are all arranged by the school student union, and you can't help it, but often the cell phone rings suddenly, and the monitor asks where you are, why haven't you come yet? Then you found that a teacher in the class informed you to have a class meeting, but you didn't see it, so this is the news that I was most afraid to see in the class, that is, the teacher suddenly asked for a class meeting and then had to let you go within a few minutes. The most terrible thing is that sometimes you have something outside, and you can't go back to school in time to attend the teacher's class meeting, and it's not just me. I'm afraid many students are afraid. For example, some students do some part-time jobs when they have no classes. Maybe when they are free again, the teacher suddenly asks you to have a class meeting at school. To tell the truth, this is a very terrible thing. You may have been busy for a long time today. If you don't go back, you will probably be found out because the teacher called the roll, and you will be scolded by the guide in the future. So it is very tangled and important. This is also the news that I hate to see, because when cleaning the classroom or cleaning his office, it is arranged according to the student number. Maybe you don't know when you will arrive suddenly, but you can't arrive in time, so it's embarrassing.