were you haveing a embarrass in library?

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last night ,i got a book what i had been interested in ,so i read it so a long time ,when i get out the reading room ,i had forget return the book to reading room on time,in which all the books you dont allow to take them out. when i recall the book on my hand,i shoud return it ,so i hurry came back the library ,i thought that i can viod the little mistake ,however,the gate of libray had closed,nobody ,but darkness.so today ,i had been return to the book what i can take back my library card what it have in the libraran'hand.do you have a embarrass in library,so simliary experience?