Read. Choose the correct answer.

New research shows that it is bad for children to watch TV, tablet or mobile phone screens before bedtime. There are over 60 different studies on how screen time affects children. 90 per cent points out that more screen time is associated with late bedtime, fewer hours of sleep, and poorer sleep quality." Screens are becoming smaller and smaller, so children can look at them in bed. More than 75 per cent of children in the study have some kind of screen in their bedroom.

Children need a lot more sleep than adults. Pre-school children need 10 to 13 hours, pre-teens should get between 9 and 12 hours, and teenagers should get between 8 and 10 hours a night. There are three main reasons how screens affect children's sleep. First, the light from screens upsets a child's body clock. The light from screens getting into children's eyes before they sleep keeps them awake.

Second, children often watch videos of things that interest them. This keeps their brain active, so they take longer to sleep. Finally, when children are watching screens, they are not exercising. Children need physical activity to make them tired.

1. What three screens did the article mention in the first sentence?

 A. TV, tablet or mobile phone

 B. TV, mobile phone or computer

 C. Computer, tablet or TV

2. What does the article say about screen sizes?

 A. Screens are getting bigger and bigger.

 B. Screens are becoming smaller and smaller.

 C. Screens are getting brighter and brighter.

3. What percentage of children in the study has a screen in their bedroom?

 A. 90 percent

 B. More than 75 percent

 C. More than 60 percent

4. How much sleep do pre-teens need?

 A. between 10 and 13 hours

 B. between 9 and 12 hours

 C. between 8 and 10 hours

5. How many reasons on how screens affect children's sleep are there?

 A. Three

 B. Four

 C. Five