The average 8-year-old spends eight hours a day with her head submerged in screen time . It is normal all over the world. But it is very harmful for the kids to do so.

Here are some reasons:

1. Kids don't learn how to play nice.

Twenty years ago, when a child fought with one of his classmates, he immediately saw the effect of his actions. The other child probably cried. When smartphones and computers put a screen between the bully and the victim, kids lose the instant feedback that their actions are hurtful. So, they don't stop.

2. Kids miss out on sleep.

By and large, kids need sleep more than anyone. In babies, kids, and teens, sleep also supports overall development of their growing brains. Using electronic devices before bed interrupts these normal, healthy rhythms. 

3. Kids risk their physical health. 

Playing games all night in front of a screen isn't a new phenomenon. But with more media now available, at all ages, the risk of weight gain also increases. Replacing outdoor play with online play also seems to hurt kids' bones. 

4. Kids' brains are changed.

Scientists say that playing games too much on the computer can lead to changes in the brain's gray matter. Kids can lose some important things in the brain, including impulse control, organization and planning skills. 

In other words, scientists are finding screens don't divorce kids from just the real world, but the consequences of living in that world.

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1.How many suggestions does the passage have?

A 1

B 2

C 3

D 4

解析：选D。D 细节理解题。根据文章四个小点可知，故选D。

2.The kids need sleep more than anyone because___________.

A it may make their weight decrease

B it will support their development of the brains

C it may change the brain’s gray matter

D it may make their health worse

解析：选B。B 细节理解题。根据文章第4段第2句In babies, kids, and teens, sleep also supports overall development of their growing brains.可知。

3.What does the underlined word “phenomenon” mean in Chinese?

A 现象

B 能力

C 水平

D 技术

解析：选A。A 词义猜测题。根据文章第5段第1句Playing games all night in front of a screen isn't a new phenomenon.可知。

4.Which of the following may not the brain lose if the kids play games too much?

A Impulse control.

B Planning skills.

C Impulse organization.

D The size.

解析：选D。D 细节理解题。根据第6段第2句Kids can lose some important things in the brain, including impulse control, organization and planning skills. 可知。

5.What’s the best title of the passage?

A Kids need enough sleep

B Kids’ brains are changed because of too much games

C Spending too much time in screen is harmful for kids

D How to keep fit

解析：选B。B 主旨大意题。 从文章第1段第3句But it is very harmful for the kids to do so.可知，这是文章的主题句。