Passage Four
Do you find getting up in the morning so difficult that it is painful? This might be called lazi-ness, but Dr. Kleitman has a new explanation. He has proved that everyone has a daily energy cycle.During the hours when you labour through your work you may say that you're "hot". That's true.The time of day when you feel most energetic is when your cycle of body temperature is at its peak. Forsome people the peak comes during the forenoon. For others it comes in the afternoon or evening. No,one has discovered why this is so ,but it leads to such familiar monologues (自言自语)as: "Get up,John! You'll be late for work again!" The possible explanation to the trouble is that John is at histemperature-and-energy peak in the evening. Much family quarrelling ends when husbands and wivesreahze what these energy cycles mean,and which cycle each member of the family has.
You can't change your energy cycle, but you can learn to make your life fit it better. Habit canhelp, Dr. Kleitman believes. Maybe you're sleepy in the evening but feel you must stay up late any-way. Counteract(对抗)your cycle to some extent by habitually staying up later than you want to. Ifyour energy is low in the morning but you have an important job to do early in the day, rise beforeyour usual hour. This won't change your cycle, but you'll get up steam(鼓起干劲) and work better atyour low point.
Get off to a slow start which saves your energy. Get up with a leisurely yawn and stretch. Sit onthe edge of the bed a minute before putting your feet on the floor. Avoid the trouble some search forclean clothes by laying them out the night before. When ever possible, do routine work in the after-noon and save tasks requiring more energy or concentration for your sharper hours.
( )48. If one wants to work more efficiently at his low point in the morning,he should__________.
A. change his energy cycle
B. overcome his laziness
C. get up earlier than usual
D. go to bed earlier
答案：C
( )49. You are advised to rise with a yawn and stretch because it will
A.help to keep your energy for the day's work
B. help you to control your temper early in the day
C. enable you to concentrate on your routine work
D. keep your energy cycle under control all day
答案：A
50. Which of the following statements is NOT true?
A. Getting off to work with a minimum effort helps save one's e,nnergy.
B. Dr. Kleitman explains why people reach their peak at different hours of day.
C. Habit helps a person adapt to his own energy cycle.
D. Children have energy cycles, too.
答案：B
( )51. Which of the following may lead to family quarrels according to the passage?
A. Unawareness of energy cycles.
B. Familiar monologues.
C. A change in a family member's energy cycle.
D. Attempts to control the energy cycle of other family member.
答案：A
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