There is a new study on teenagers who are between 13 and 19 years old. The study shows that today's teenagers are growing up more slowly than those before.
Scientists from San Diego State University have worked on a study on the behaviors(行为) of 8 million teenagers in seven different countries over the past 40 years. The results tell us that compared to(比较) the teenagers in the past, today's teenagers are less responsible(负责任的) and that they take much more time to do things than their parents or grandparents did. They are also less possible to have a part-time job. What's more, when they get older, they begin to understand that they should help their parents do housework, while their grandparents and parents helped do housework at a very early age. "This is a 'slow life strategy(策略)', " said Professor Jean Twenge.
"The development(发展) of today's teenagers has slowed down. 18-year-olds are more like 15-year-olds in the past, " said Professor Twenge. "Teenagers are taking much fewer risks(风险) than those did in the past. " Scientists have also found that more teenagers spend longer time living with their parents instead of renting (租) their own room or apartment.
One of the reasons(原因) for these behaviors is that today's teenagers would like to spend much time online. They keep on connecting with social media(社交媒体), watching videos or playing games on the Internet. Instead, they spend less time living in the real world. Another one is that parents do much for their children and protect them too much. In fact, parents had better let their children do everything by themselves. They should try their best to make their children independent as soon as possible.
a. Because their parents do too many things for them.
b. Because it's difficult for them to find a job in society.
c. Because they don't like living in the real world at all.
d. Because they spend too much time online.
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