Jim wants to borrow (借) a book from the school library. He comes to the library with Jack. They can't see any assistants (图书管理员) in it, but only some robots standing there. Then Jim says to the robot, "Hey, give me the book." But the robot doesn't work. Then Jack tells him," You must say 'Please' first when you want to borrow something from him." So Jim does. The robot brings the book. But this time Jim can't take the book out of the robot's hand. Jack tells him again, "You must say 'Thank you' before you take the book." So Jim says, Oh, "thank you very much, Mr. Robot." The robot smiles and gives the book to him.