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Maybe you are proud of yourself because you only sleep a little hours a night. 21 ____________
However, are you feeling tiring and sleepy throughout the day? Do you 22 ____________
have a hard time keeping your eyes opening when you study? Have you nodded 23 ___________
off while reading? If you can answer “Yes” for any of these, it shows you cannot
have enough sleep. A research shows that most adults should have seven to nine 24 ___________
hours’ sleep. As for teens, they need even more. If you don’t always have a good sleep,
you should avoid drinking caffeinated drinks, such as coffee, tea and soda,
for at least 6 hours before go to bed. You should also avoid eating big meals 25. ___________
before sleeping. Eat a big meal can make you feel sleepy and prevent you 26. ___________
from sleeping good. You should build a healthy sleeping environment. 27. ___________
With the light on, can you have a good sleep? Of course yes. So, you’d better 28. ___________
keep your bedroom dark and cool. You should avoid using electronics before bed.
The light from electronics can keep you from falling sleep. Try reading 29. ___________
books or listen to quiet music instead. Please get enough sleep from now on. 30. ___________