1. (2020八下·杭州期中) 阅读理解

    Tired of solving a problem? Sleep on it! A study by a group of German scientists shows that getting enough sleep makes people better problem solvers. They found that people who sleep for at least eight hours each night are better at solving problems and thinking creatively. For their study, the scientists divided (分开) 106 people into groups. The group that got eight hours of sleep was more than twice as likely to find a shortcut for solving a math problem as the group that stayed awake all night.

    Being short of sleep has become a bad habit for many American kids. According to a survey by the National Sleep Foundation, 51% of kids aged 10 to 18 go to bed at 10 p.m. or later on school nights. The foundation reported that nearly 60% of 7- to 12-year-olds agreed that they felt tired during the day.

    This is important information for parents and kids. Getting enough sleep can improve a kid's performance (表现) at school.

1. （1） What does the study by a group of German scientists show?

   A . People who sleep enough are better problem solvers. B . School teachers and parents should sleep more hours each night. C . Good math students do not need eight hours of sleep. D . The National Sleep Foundation has 106 members.
3. （2） According to the passage, how did the group with eight hours of sleep show that sleep improves performance?

   A . They showed how well they know about math. B . They found a quicker way to solve a math problem. C . They got much better grades on the tests. D . They didn't fall into light sleep while taking the test.
5. （3） Why is being short of sleep bad for kids?

   A . Because kids require more sleep. B . Because kids fail in school if they are not in bed by 8:00 p.m. C . Because kids can't perform well at school if they feel tired. D . Because not getting enough sleep is good for kids' brains.
7. （4） Where are we most likely to read this passage?

   A . In a story book. B . In a computer magazine. C . In a history book. D . In a newspaper.