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Sleep is a normal physiological process that restores us phy

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Sleep is a normal physiological process that restores us physically,emotionally and intellectually.People who are not able to get a certain amount of sleep are (21) able to handle stress emotionally and physically.
Most adults have (22) insomnia at one time in their lives.Insomnia is one of the most common medical complaints (23) include having trouble falling or staying (24) .In the morning people with insomnia usually are left weak,feel whacked and unable to normally function during the (25) .Insomnia can undermine not only one’s energy level and mood,but also affect health,work performance and (26) of life.It is recommended that adults sleep(27) 7 or 8 hours per night in order to (28) good health and good looks.But (29) people differ widely in their sleep needs,insomnia is not defined by a specific number of hours of sleep that one gets.An estimated 30 to 50 per cent of the general population are (30) by insomnia,and 10 per cent have a long-term,or chronic insomnia.
21:being(being able to)
22:chronic
23:which is
24:sleep mode(睡眠模式)
25:evening
26:the quality of life
27:between
28:keep a
29:different people (have )differ(这句是不是少了个have?)
30:unhealthy
只是参考一下,不一定都对~因为你的问题很含糊.