题目内容：

    Fangfang, from Liaoning, just became a high school student last September. She gets up at 5:30 am every day and goes to bed at about midnight. Fangfang feels s1. all the time. “I want to go to sleep early but I have to finish all my schoolwork first,” she said. March 16 is World Sleep Day. It aims to celebrate the benefits(好处) of good and healthy sleep.

Sleep is like food for the brain. Sleep helps the body and brain grow and d2.. Adults need seven to nine hours of sleep every night. For students aged 10 to 17, a healthy amount is about eight to nine hours per night. But many students don't get enough sleep because of early school start times and h3. homework. About 80 percent of middle school students don't get enough sleep. For some students, they want to sleep early, but they keep worrying about their schoolwork and can't fall asleep quickly. For others, they may even have insomnia(失眠症). These sleeping problems greatly a4. people's lives. Experts have shown that lack of sleep for teenagers leads to poor grades. Students without enough sleep can't pay attention in class or do well in sports. Also, the lack of sleep may make them u5.. They may get angry easily or remain blue all day.

Luckily, with good sleep h6., it's easier to fall asleep, for example, avoiding drinks that make people e7. late in the day, going to sleep at the same time each night, and sleeping in a comfortable place that is dark, quiet, and neither too warm or too cold.