单选题 Admission: ADULTS20p, CHILDREN FREE. A．Children will be free. B．All people have to pay 20 pence to get in. C．Children don't have to pay adults to get out.
【正确答案】 A
【答案解析】[精析] 从题干得知，成人入场费为20便士，儿童免费。故选A。