switch （）
            {
                case "Mon":
                    Console.WriteLine("今天是星期一，学英语");
                    break;

                case "Tur":
                    Console.WriteLine("今天是星期二，学画画");
                    break;

                case "Wed":
                    Console.WriteLine("今天是星期三，学音乐");
                    break;

                case "Thu":
                    Console.WriteLine("今天是星期四，学数学");
                    break;

                case "Fri":
                    Console.WriteLine("今天是星期五，学舞蹈");
                    break;

                default:
                    Console.WriteLine("今天是星期日，放假休息");
                    break;
            }