Tourism(旅游)was not always as important as it is today. In the past only rich people could travel【T1】______to other countries. Bu

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问题     Tourism(旅游)was not always as important as it is today. In the past only rich people could travel【T1】______to other countries. But in 1998 one person in ten【T2】______a country away from home.
    More people travel today because there is a【T3】______middle class in many parts of the world. People now have more money for travel. Special airplane fares for tourists make travel【T4】______and thus more attractive than ever before. One person does not travel for the same reason as another. But most people【T5】______seeing countries that are different from their own. They also like to meet new people and try new foods.
【T3】

选项

答案growing

解析 由空格处前的冠词a和空格后的名词短语middle class可预测,此处需要填入修饰成分。结合录音,此处填入growing。
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