To resolve this problem I would take help of my class teacher and some of the good friends I'm having. firstly I would search the whole class room with the class monitor if I found it out then I'm lucky or else I would go to teacher and inform everything that happened and I would tell teacher that their was even a fault of mine I'm not at all blaming the class monitor. then I would go to the library in-charge and I would pay the fine to the in-charge if I need to and even tell the in-charge sorry for our fault done.
hope so my answer is useful and mark as best if possible plz plz