Last Saturday morning, Lucy went to a supermarket. She wanted to buy a big cake for her mother's birthday. There were many people in the supermarket. Suddenly, Lucy saw a beautiful wallet on the floor. Whose wallet is it? She asked, but nobody answered. Excuse me, is this wallet yours, sir? She asked the man in front of her. No, it isn't. The man said, Perhaps it's hers. He pointed the woman in front of him. Is this wallet yours? She asked the woman. Let me have a look. Oh, yes, it is. Thank you very much.