Please ask the library to check the collection number of the book under your name. If there is only one book in the library now, you can use it as a basis to argue that you have not borrowed it. Maybe the library made a mistake.

I'm afraid someone will borrow a book with your card, which will be very troublesome. In the latter case, you can write a letter of help to the client, apply for not paying the late fee, and compensate according to the original price of the lost book. Ask the head teacher for help, and ask the department for help.

Really can't. You can consult a lawyer. There should be a solution. Don't worry too much. ...