Tourism(旅游) was not always as important
as it is today. In the past only wealthy(富有的) people could
travel{{U}} (41) {{/U}}vacations to other countries. More people travel
today than in the past{{U}} (42) {{/U}}there is a growing middle class
in many parts of the world. People now{{U}} (43) {{/U}}more money for
travel. Special airplane fares for tourists make travel{{U}} (44)
{{/U}}expensive and thus more attractive(有吸引力的) than{{U}} (45)
{{/U}}before. One person does not travel for the same reason
as{{U}} (46) {{/U}}. But most people enjoy{{U}} (47)
{{/U}}countries that are different from their own. They also like to meet
new people, try new food and{{U}} (48) {{/U}}life in other parts of the
world. Tourism{{U}} (49) {{/U}}many changes in a country
and in people's lives. People build new hotels and restaurants and train native
men and women{{U}} (50) {{/U}}tour guides to show tourists interesting
places.