填空题 Tourism (旅游) was not always as important as it is today. In the past only rich people could travel 26 to other countries. But in 1998 one person in ten 27 a country away from home.
More people travel today because there is a 28 middle class in many parts of the world. People now have more money for travel. Special airplane fares for tourists make travel 29 and thus more attractive than ever before. One person does not travel for the same reason as another. But most people 30 seeing countries that are different from their own. They also like to meet new people and try new foods.