Do you find getting up in the morning so difficult that it’s 【S1】______? This might be called laziness, but Dr. Kleitman has a n

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问题     Do you find getting up in the morning so difficult that it’s 【S1】______? This might be called laziness, but Dr. Kleitman has a new 【S2】______. He has proved that everyone has a daily energy cycle.
    During the hours when you labor through your work you may say that you’re "hot". That’s tree. The time of day when you feel most 【S3】______ 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 【S4】______ why this is so, but it leads to such familiar monologues(独白) 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 【S5】______ 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 【S6】______, it better. 【S7】______ can help, Dr. Kleitman believes. Maybe you are 【S8】______ in the evening but feel you must stay up late anyway. Counteract(抵制) 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, 【S9】______ before your usual hour. This won’t change your cycle, but you’ll get up steam(慢慢活跃起来) and work 【S10】______ at your low point.

               Word Bank:
A. raise                  I. better
B. explanation            J. ends
C. discovered             K. painful
D. Habit                  L. energetic
E. sleepy                 M. dependent
F. serve                  N. upset
G. Story                  O. rise
H. fit

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