题目内容：

    Parents now complain about teenagers' noses always in their phones. But they might want to check out their own screen time habits.

A study was put out recently. It was from the Pew Research Center. The study surveyed 743 U.S. teens and 1,058US parents of teens from March7to April10. It found that (two thirds of the parents worry about the amount of time their teenage children spend in front of screens. But more than a third of the parents also worry about their own screen time.

Over a half of the teens said that parents are often or sometimes distracted(精神不集中的) .

But have a conversation with them. The study also notes that nearly three fourths of the teens check messages as soon as they wake up. Parents do the same, but at a low rate----57%. However, that is still a lot.

Many teens are trying to do something about it. 52 percent have cut back on the time they spend on their phone. 57 percent have done the same with social media.

Experts say parents have a big role in their kids' screen habits. Setting a good example is a big part of it.

"Kids don't always do what we say but they do as we do," said Donald Shifrin. He is a professor at the university of Washington School of Medicine. Parents are at the door that kids will walk through on their way to the world.

1.What do we know from the survey?

A.All parents are worried about their own screen time.

B.Some parents don't pay attention to what the kids are going to say.

C.almost 75% of parents check the messages when they wake up.

2.According to the survey, how many parents are worried about their own screen time?

A.about704 B.about 352 C.about 247

3.What's Paragraph 4 mainly about?

A.The efforts that teens have made to reduce the screen time habits.

B.Teens' plan to cut back the screen time habits.

C.Teens' resolution to spend less time on the screen

4.According to the expert, parents can change their kids' screen time habits by ________.

A.talking with their kids. B.cutting back kids' screen time. C.changing their own habits.

5.What's the main idea of the passage?

A.It's bad to use phones very often.

B.Teens and adults' screen time.

C.Experts show their worries about teens' screen time habits.