题目内容：

    Many children spend a lot of time watching or playing with electronic media –from televisions to video games, computers and other devices（设备）.

So, it is natural that parents should wonder about the time children spend looking at a TV or computer screen. Americans say “screen time” when they talk about any time children spend in front of an electronic device.

Perhaps parents can stop worrying so much about screen time, at least for older boys and girls. In October 2016, the American Academy of Pediatrics (AAP) listed several suggestions for parents and child care workers. Here are some of the suggestions.

Avoid(避免) digital media use in children younger than 18 to 24 months.

For children aged 18-24 months, avoid letting the child watch media alone. And avoid using media as a way to comfort your child.

For children two to five years of age, allow one-hour screen time on “high-quality（质量）programming” a day and watch it with your child.

For children aged 6 and older, don’t spend too much time using media. Also, make sure that screen time does not take the place of healthy sleep, exercising, doing homework and other activities.

Make sure to have media-free time together as a family, such as dinner or driving. Also make some areas of the home media-free. Turn off you child’s electronic devices an hour before bedtime.

1.What is “screen time” according to Americans?

A.A kind of timing system（系统）.

B.A survey on electronic media

C.Any time children spend in front of electronic media.

D.Any electronic device children like to play with

2.What did AAP do in 2016?

A.They gave some practical suggestions.

B.They told parents how to make their children’s screen time less.

C.They trained many child care workers.

D.They raised much money to stop children using electronic devices.

3.How do parents deal with the screen time for children two to five years of age?

A.Choose proper programs and watch with them. B.Play with them for at least one hour.

C.Avoid letting them watch TV. D.Don’t worry about them.

4.How does AAP show too much screen time?

A.An hour or more every day. B.Using too many electronic devices.

C.Screen time takes the place of other activities D.Using electronic media to comfort the children.