The first sentence about not locking the door in piano class: respect the teacher. I think you want me to write a review. In essence, I hope I can understand my mistakes not only in theory but also in practice through introspection, and clearly want to know how to correct them.
The first is the memory of my behavior. I just think what you did can simulate the scene at that time, so reflect on whether I am wrong, why I am wrong and how to correct it. The following is the memory: March 20 12, 18, after lunch break, a group of children in our dormitory 7#50 1 were sleepy but hurried out. Seeing that the class time is coming, they realize that they shouldn't do things right at the same time, but taking a nap is not clear enough. So I walked quickly to the classroom. Helpless, he found that the door of our bedroom was silent and not closed. ...