答案：Great changes have taken place in people's lives over the years.
In the past, a big family had to live in a small house. People kept in touch with relatives and friends by writing letters. They watched TV, listened to the radio or read newspapers for news and other information. Children used to go to school on foot or by bike.
Now more and more people live in big and bright flats. People can talk to others over the telephone or on the Internet. Almost every family has computers. They often use computers to do many things. Sometimes, they go travelling in their free time. For example, they go to some theme parks. Today, people still ride their bikes to school or work, but they can also travel by bus, by taxi or by underground. More and more families have their own cars.
In a word, people live better than before. I'm so excited to see these changes.