also "visited various social media 30 times per week. "

Thirty percent of the study's participants reported having serious problems with sleeping. Those people who used social media a lot were three times more likely to have a sleep disorder. And those who spent the most time on social media were two times as likely to suffer from sleep disturbances.

Levenson said the number of times a person visits social media is a better predictor of sleep problems than overall time spent on social media. If this is true, she adds, then practices that stop such behaviors may be the most effective.

8.What's the main idea of the text?

A. The researchers focus on social media. B. The researchers manage to handle sleep problems

C. Social media affects sleep. D. Doctors treat young patients.

9.When treating sleep problems, doctors are advised to________________ .

A. offer some advice about giving up social media

B. ask the patients about young adults' use of social media

C .give young adults some medicine

D .ask about the patients' living conditions

10. How did the researchers mainly carry out the study?

A. By doing online research. B. By doing questionnaires.

C. By collecting published data. D. By giving an example.

11.What can be inferred from the text?

A. Men are more likely to suffer from a sleep disorder than women.

B. People often using social media are less likely to have a sleep disorder.

C. Using computers less helps avoid sleep problems completely.

D. Sleep problems can be determined by the times of a person visiting social media.

D

　　Rain beat against the window, matching my mood. I should have known that my new job at the hospital was too good to be true. Throughout the day, rumors (传言) warned that the newest employee from each department would be laid off. I was the newest one in the training department.

　　My boss appeared. "You probably know we're cutting back," he said. "Administration wants us to offer outplacement classes to help those employees find other jobs, showing them how to act in an interview, for example." "Fine," I answered unwillingly, not knowing what else to say.

　　I decided to go home early that day. In the hall, I met the lady who brought us cookies every Friday. She was a little woman with gray hair. Only her head and the top of her green apron were visible over the cart (小车) loaded with cleaning supplies. At least she had a job!

　　At the final meeting, laid-off workers formed a line at the door. A colleague whispered, "I can't believe our Cookie Lady is being laid off. We'll miss her as much as we'll miss her cookies." When the colleague spoke to her in Spanish, I knew my classes would be useless for her and I realized how much better off was than this poor woman.

I decided to do something for her. I wrote to a newspaper expressing how I felt about the unselfishness of the Cookie Lady who needed a job. A few days later, my article appeared in the newspaper and the Cookie Lady was allowed to stay in her position. On the same day, I received a