学进去

How much time do you spend in front of a screen every day? If your answer is about one hour, then maybe you are one of the ________ teenagers in the world.

Scientists did a ________. They asked students aged 13 to 18 how long it ________ them to have fun on phones and computers. They also asked about ________ feelings of happiness. They found that those who spend more time on their smart phones are unhappier. “Spend no more than two hours a day on digital media(电子产品), ________ try to spend more time with friends and on exercise. These two activities bring greater happiness.” Jean Twenge, the scientist who led the study, said.