听下面一段材料，回答第1至4题。 1. Where did Fred take her mother to? A. To New York. B. To a shoe shop. C. To an exhibition. 2. How much did Fred have to pay for his mother's shoes? A. He had to Pay 12 dollars. B. He had to pay 24 dollars. C. He had to pay the rest of money. 3. Who brought Fred's mother's friends to the shoe shop? A. Fred. B. Fred's mother. C. The shopkeeper. 4. What could happen after the shopkeeper told Fred the thing? A. Fred's mother had to pay the money for her shoes B. Fred's mother had to pay the money for her friends' shoes. C. Fred had to pay the rest of money for all the shoes his mothers' friends bought.