A college graduate（毕业生）from Shanxi named Wu Jun created a 9﹣page"WeChat guide"．With drawings and simple words，the step﹣by﹣step guide explains how to send messages，take pictures and make video calls．Wu made the guide for her parents．"My parents are getting old．They need an easy way to learn how to use technology，she said．

Wu's experiences is common nowadays．Worldwide，40 percent of parents learn about new technologies，including computers，mobile Internet，and social media（媒体），from their children，according to a study．

Parents used to teach their kids about almost everything．Now for the first time，the teachers become the students，while the students turn into the teachers．

The change of the roles comes from the rapid development of society tea and technology，says Zhou Xiaohong，a professor（教授）from Nanjing University．Zhou said the Internet and other forms of media give children ways to get information besides from asking older generations（辈）．As a result，in the age of information，it's possible that children know more than their parents do．

It's reported that 56.7 percent of Internet user and 67.2 percent of social media users in China are under the age of 30．The young generation usually acts as a link（桥梁）between their families and the new environment．When they teach their parents new technologies，parents can connect to the new world by themselves．

In Wu's eyes，teaching her parents about WeChat bring her closer to her parents．"People can communicate more by using new technology．Why should we keep our parents out？"said Wu．

51．Wu's 9﹣page"WeChat guide"made it　　 for her parents to learn the new technology．

A．harder                 

B．simple                    

C．slower

52．What has caused the change of the roles about teaching in the family？　　

A．The rapid development of society and technology．

B．The growing numbers of old people．

C．The unscientific design（设计）of new technology．

53．Why is it possible that children know more than their parents do？　　

A．Because children have better memories．

B．Because children have more ways to get information．

C．Because their parents refuse to accept new things．

54．What does Wu think of the phenomenon（现象）that kid's teach parents？　　

A．There is no need for parents to learn new technology．

B．Parents are supposed to learn new technology by themselves．

C．Children should teach their parents new technology to make communication convenient．

55．We can infer（推断）from the passage that　　．

A．it's never too old to learn

B．all's well that ends well

C．a good beginning is half done．

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