单选题 People today are still talking about generation gap. Some parents complain that their children do not show them proper respect, while children complain that their parents do not understand them at all.
What has gone wrong? Why has generation gap apeared?
One important cause is that young people want to choose their own lifestyle. In more traditional societies, when children grow up, they are expected to live in the same area as their parents, to become the kind of person that their parents like, and often to continue the family occupation.
Parents often expect their children to do better than they do, to find better jobs, to make more money, and to do all the things that the parents themselves were unable to do. Often, however, the high wishes that parents place on their children are another cause of generation gap. enoltoenig
Finally, the high speed of social changes deepens the gap. In a traditional culture, people are valued for their wisdom, but in our society today the knowledge of lifetime may be out of use overnight.
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In today 's society, the knowledge of lifetime________