Sound sleep occurs when one.s internal clock is regulated.Circadian rhythms(生理节奏）can
become compromised quite easily.Many people with sleep troubles tend to vary bedtimes.To avoid this
common problem,sleep sufferers should go to bed and wake up at the same time every day.To help
improve circadian rhythms,sufferers should enjoy 15 minutes of sun exposure the first thing in the
morning.
A bedtime routine can help prevent insomnia(失眠）。One hour before bedtime,one should lower
the lights and relax.Reading a book or listening to calm music can help prepare the body for a good
night.s sleep.Taking a warm,candlelit bath or drinking a cup of warm milk can also help you prepare
for deep sleep at night.
Stress can have a bad effect on the body and the ability to sleep.A daily exercise routine can help
lower the body.s stress naturally.One can also manage stress by writing diaries.Writing diaries can
help people express their anxieties,plan for the future and improve sleep.Other ways to lower stress
include deep breathing exercises and progressive muscle relaxation.
The light sending out from computers,cellphones,tablets and televisions can cause sleep
problems.Therefore,these items should be turned off at least an hour before bedtime.Additionally,
lowering the backlight on these electronic devices earlier in the evening can help you fall asleep faster
and stay asleep longer once bedtime arrives.A perfect bedroom invites sweet sleep.Most people sleep better in a cool,dark,and quiet room.
Lower the temperature in the room to 16~20 degrees for a peaceful night.s sleep. A dark room can be
accomplished by installing light blocking curtains or wearing a sleep mask.Noise can be reduced with
either earplugs or a white noise machine.Finally,a comfortable mattress
（床垫）and pillows are
essential to a good night.s sleep.
36.What is the passage mainly about?
A.How to get a sound sleep.
B.How to lower body stress.
C.How to regulate internal clocks.
D.How to manage anxieties.
37.According to Paragraph 2,which of the following may lead to insomnia?
A.Reading a book for relaxation before bedtime.
B.Lowering lights one hour before bedtime.
C.Drinking some warm milk before bedtime.
D.Listening to rock music before bedtime.
38.What can be done to reduce stress?
A.Doing exercise every day.
B. Making plans for the future.
C.Writing about your sleep patterns.
D. Learning to hold your breath.
39.What is the perfect condition for sleep?
A.A quiet room with flashing lights.
B.A bright
room with white curtains.
C.A cool room with comfortable pillows.
D.A dark
room with electronic devices.

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