Not being able to fall asleep or stay asleep is not a disorder in itself but a sign of som

Not being able to fall asleep or stay asleep is not a disorder in itself but a sign of some other problems, often a physical one.
If you have trouble sleeping, the American Sleep Disorders Association suggests that, for a week or two, you put down the time you go to bed, get up, exercise, and drink coffee, tea or wine.  The purpose is to find the habits that may affect your sleep.
Then:
a.      Don’t drink coffee in the six hours before going to bed.
b.      Stop smoking and drinking at bedtime.
c.      Don’t sleep during the day.
d.      Go to bed at the same time every night.  Set your alarm clock for the same time every morning and get up at that time, whether or not you sleep well.
e.      Use the bedroom only for sleep.  Read, watch TV, eat and talk elsewhere.
f.       Take sleeping pills according to your doctor’s directions and don’t take them for longer than three weeks at a time.
g.      If you haven’t fallen asleep within 15 minutes of going to bed, don’t turn over worrying about it.  Get up and read or watch TV until you are sleepy, then return to bed.
If you continue to have trouble sleeping, ask your doctor for help or go to a sleep-disorders center.
【小题1】 According to the passage, there is probably      if you are not able to fall 
asleep or stay asleep.A．a bad way of sleepingB．a disorder in sleepC．a physical reasonD．a problem caused by the brain【小题2】If you have trouble sleeping, you should try to     .A．ask a doctor for help or go to a sleep-disorders centerB．put down the time you do things every day C．do more physical exercise D．find out the cause first【小题3】According to the passage, which of the following would be the best way to help you sleep well?A．Taking some sleeping pills every day.B．Reading books before you go to bed.C．Setting your alarm clock at night.D．Forming good living habits.【小题4】The author writes this article in order to     .A．tell us not being able to fall asleep is a serious diseaseB．provide us with some suggestions on sleep problemC．persuade us not to go to see the doctors when we are illD．help the American Sleep Disorders Association to find the causes of not being able to fall sleepC