People need good-quality, uninterrupted sleep in order to _____.
A.help the body repair tissue and restore itself
B.digest their food efficiently
C.stop producing growth hormone
D.have enough energy to exercise
A.help the body repair tissue and restore itself
B.digest their food efficiently
C.stop producing growth hormone
D.have enough energy to exercise
The purpose of this passage is to______.
A.encourage teenagers to sleep as much as possible
B.discourage teenagers'from staying up late at night
C.inform. people of the damage "junk sleep" does to teenagers'health
D.instruct people how to have a long and good-quality sleep
What is true of human sleep?
A.Most people need less sleep when they grow older.
B.Most people need seven and a half hours of sleep every night.
C.On average, people in the US today sleep less per night than they used to.
D.For most people, less than six hours of sleep on a typical work night is enough.
It is true that older people need less sleep than younger people.
A.Right
B.Wrong
C.Not mentioned
The subject of this passage is ________.
A.why people sleep
B.the human need for REM sleep
C.the characteristic of REM sleep
D.physical changes in the human body
17 It is true that older people need less sleep than younger people.
A Right B Wrong C Not mentioned
A.Sleep is the first that can be sacrificed when one is busy.
B.They need more sleep to cope with the complexities of everyday life.
C.To sleep is something one can do at any time of the day.
D.Enough sleep promotes people's drive and ambition.
The doctors came to visit Jercy Page, expecting______.
A.to cure him of his sleeplessness
B.to find that his sleeplessness was not really true
C.to find out why some old people didn't need any sleep
D.to find a way to free people from the need of sleep
To get a good night’s rest,people may not need to ___.
A fall asleep again .
B become more energetic the following day
C sleep less than 7 hours
D confirm those serious consequences
E suffer sleep problems
F sleep more than 8 hours
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