A、A membership card. B、A sleeping bag. C、A letter of introduction. D、Cooking equipment. A

For years, children in the industrial areas of Europe and America seldom left their smoky cities to see the beauties of the countryside. This was not because the woods and fields were always far away, but because they were too far from the city to permit people to make a day trip between morning and nightfall.
    In 1907, a young German schoolmaster had an idea which changed this state of affairs. He decided to turn his little schoolhouse into a dormitory for the summer holidays. Anyone who brought his sleeping bag and cooking equipment along could stay there for a very small quantity of money. The idea was a success. A few years later, the schoolhouse was much too small to hold the many young people who wanted to stay there. As a result, a dormitory was set up in an old castle nearby. This was the first Youth Hostel.
    Today, young students and workers of every country can meet in the hostels and get to know each other. When young people arrive at a hostel, they have only to show their card of membership in a hostel organization in their own country. This card will permit them to use the facilities of hostels all over the world for a very low price.