填空题

You know you need to eat nutritious foods, exercise and even play safe to stay physically healthy. But, sleep for physical (36) How can that be an essential part of physical fitness Sleep is (37) important for your health and safety. You need to get enough sleep as well in order for your brain to work (38) . Did you know that sixty percent of adults in our country have sleep problems That’s definitely not an (39) statistic. Have you ever heard of the term sleep deprivation That term means lack of sleep. If sleep deprivation occurs for a lengthy time, many (40) things may happen. Sleep deprivation can make life seem more (41) and therefore makes it more difficult for the person to deal on a day-to-day basis. Sleep deprivation increases the (42) that a person will get sick be cause it (43) the body’s ability to fight infections. Finally, (44) So how much sleep is enough Well, it depends on the person. (45) The average teenager needs a little more than 9 hours. Changes in a teenager’s body are tile reason for this. Their body clock is delayed during this time of great change and they naturally want to go to sleep later at night and therefore wake up later. (46) , so they need to work on gradually adjusting their sleeping patterns.