填空题 Tourism (旅游) was not always as important as it is today. In the past only 1 people could travel on vacation to other countries. But in 2 , one person in ten visited a country away from home.
More people travel today because there is a 3 middle class in many parts of the world. People now have more money for travel. Special airplane fares for tourists make travel 4 and thus more attractive than ever before.
One person does not travel for the same reason as another. But most people 5 seeing countries that are different from their own. They also like to meet new people and try new foods.