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A. enjoy B. vacation C. less expensive D. rich E. growing Tourism( 旅游) was not always as important as it is today. In the past only ____41______ people could travel on ___42______ to other countries. More people travel today because there is a _____43____ middle class (中产阶级) in many parts of the world. People now have more money for travel. Special airplane fares for tourists make travel _______44______ and more attractive than ever before. One person does not travel for the same reason as another. But most people ___45_____ seeing countries that are different from their own. They also like to meet new people and try new foods.