问题详情

Section C
Tourism(旅游) was not always as important as it is today. In the only【11】______people could travel on vacation to other countries. But in【12】______one person in ten visited a count away from home.
More people travel today because there is a【13】______middle class in many parts of the world. People now have more money for travel. Special airplane fares for tourists make travel【14】______and thus more attractive than ever before. One person does not travel for the same reason as another. But most people【15】______ seeing countries that are different from their own. They also like to meet new people and try new foods.
【11】
A．rich
B．reach
C．older
D．elder请帮忙给出正确答案和分析，谢谢！