阅读表达。 

Jim likes reading very much. One day he wants to borrow a book from the school library. He comes to the library with his good friend Jack. They can't see assistants in it, but only some robots standing there. Then Jim says to one of the robots,"Hey, give me the book". But the robot doesn't work.

Then Jack tells Jim, you must say"please" first when you want to have something. Jim did so. The robot brings a 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,"thank you very much, Mr Robot. The robot smiled and gave the book to him.