1. (2019八下·东城期末) 阅读理解

    Have you ever been angry with your parents about putting away the iPad or turning off a video game? Most families are having these fights. In 2018, Brigham Young University and Deseret News did their American Family Survey (调查). It showed that the Number One worry for parents about teenagers was too much technology (科技).

    If you're in school now, you may not remember a time before there were smartphones and tablets everywhere. The iPhone came out in 2007 and the iPad a few years later, in 2010. But screen (屏幕) time is nothing new. When your parents were growing up, they watched as much television as you do now, or even more. They probably played video games, too.

    Mobile devices (设备) are different, though, because they can come with us everywhere we go: to the dinner table, to restaurants, into the car, into the bedroom when we're going to sleep. They are always trying to make us pick them up or keep using them. That's part of what makes smartphones smart! But it also means that they always stop us from having family time. And unlike with TV, which people often watch as a family, everyone—including parents—is now distracted (分心) by his or her own little machine.

    Studies show that too much screen time can cause problems. More than two hours a day of screen time raises your risk of being overweight. Too much screen time at night stops you from getting healthy sleep. Children who grow up with the most screen time (several hours a day) can have a hard time doing well in school. And many families fight about screen time, which is no fun for anyone.

    The solution is to talk about screen time. Make an agreement with your family about where, when, and how you are going to use computers and other devices. No more than an hour a day is suggested for children during the school week. Parents, too, should put down their phones.

    When you do use a device, remember to enjoy it with your family, perhaps by playing games or watching a movie. The American Academy of Pediatrics says it's the best way for children to grow up healthy in our digital world.

1. （1） According to the survey, what do teenagers' parents worry most?

   A . Teenagers do badly at school. B . Teenagers have fights with classmates. C . Teenagers have risks of being overweight. D . Teenagers spend too much time in front of screens.
3. （2） The writer compares mobile devices with televisions to explain _____________.

   A . why parents prefer watching TV B . why mobile devices lead to less family time C . why smartphones are smarter than televisions D . why mobile devices can cause health problems
5. （3） What is the writer's purpose in writing the passage?

   A . To give parents advice on using smartphones. B . To introduce the development of new technology. C . To tell children how to use mobile devices in a right way. D . To ask children to spend less time playing computer games.