电子课本网 第12页

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In their free time, they often dance in those open spaces.
Now people are used to keeping in touch with each other through mobile phones.
        In the past, people lived a poor life in old houses. The rubbish was 
everywhere. As a result, there was serious pollution. People went out mostly 
on foot or by bicycle.Few visitors came here. 
        Now there have been great changes here. People enjoy the blue sky,green
mountains and clean water. There are modern communities with tall buildings
everywhere. Almost each family has a car. Mobile phones and computers are 
quite popular. Thousands of visitors come to visit here every year.
        I think, with the development of science and technology, people will enjoy 
a more comfortable and healthier life in the future.