单选题 Do you find getting up in the morning so difficult that it's painful? This might be called laziness, 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. For some 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 as, "Get up, John! You'll be late for work again!" The possible explanation to the trouble is that John is at his temperature and energy peak in the evening. Much family quarrelling ends when husbands and wives realize 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 can help, Dr. Kleitman believes. Maybe you're sleepy in the evening but feel you must stay up late anyway. Counteract your cycle to some extent by habitually staying up later than you want to. If your energy is low in the morning but you have an important job to do early in the day, rise before your usual hour. This won't change your cycle, but you'll get upstream and work better at your low point.
Get off to a slow start which saves your energy. Get up with a leisurely yawn and stretch. Sit on the edge of the bed a minute before putting your feet on the floor. Avoid the troublesome search for clean clothes by laying them out the night before. Whenever possible, do routine work in the afternoon and save tasks requiring more energy or concentration for your sharper hours.
单选题 If a person finds getting up early is a problem, most probably ______.
  • A. he is at his peak in the afternoon or evening
  • B. he is not sure when his energy is low
  • C. he refuses to follow his own energy cycle
  • D. he is a lazy person
【正确答案】 A
【答案解析】[解析] 根据文中所阐述的理论，A是惟一正确的答案。
单选题 Which of the following may lead to family quarrels according to the passage?
  • A. Unawareness of energy cycles.
  • B. Familiar monologues.
  • C. Attempts to control the energy cycle of other family members.
  • D. A change in a family member's energy cycle.
【正确答案】 A
【答案解析】[解析] 从第二段最后一句话可推断出，家庭的争吵往往是由于家庭成员不知晓对方的能量周期而造成的。
单选题 If one wants to work more efficiently at his low point in the morning he should ______.
  • A. get up earlier than usual
  • B. change her energy cycles
  • C. overcome his laziness
  • D. go to bed earlier
【正确答案】 A
【答案解析】[解析] 参见第三段倒数第二句话。
单选题 You are advised to rise with a yawn and stretch because it will ______.
  • A. keep your energy cycle under control all day
  • B. help to keep your energy for the day's work
  • C. help you to control your temper early in the day
  • D. enable you to concentrate on your routine work
【正确答案】 B
【答案解析】[解析] 根据第四段可知，这样做有助于为一天的工作保存能量。
单选题 Which of the following statements is NOT true?
  • A. Children have energy cycles, too.
  • B. Habit helps one adapt to his own energy cycle.
  • C. Getting off to work with a minimum effort helps save one's energy.
  • D. Dr. Kleitman explains why people reach their peaks at different hours of day.
【正确答案】 D
【答案解析】[解析] 第二段说到：还没有人能解释为什么不同的人达到自己能量顶峰的时间往往会有所不同。