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 ___36____. He has proved that everyone has a daily energy cycle.
During the hours when you labour through your work, you __37___ 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 ___38____. For some people the peak comes during the forenoon. For others it comes in the afternoon or evening. No one has discovered __39___ this is so , but it leads to such familiar monologues （自言自语）__40___ “Get up , John ! You’ll be late for work again!” The ___41___ explanation to the trouble is that John is at his temperature—and —energy peak in the evening. Much family quarrelling ___42___ when husbands and wives realize what these energy cycles mean, and which cycle each member of the family has.
You can’t change your ___43___, but you can make your life ___44___ it better. Habit can help. Dr. Kleitman believes. Maybe you’re sleepy in the evening but feel you must stay up late ___45___. Counteract （打乱）your cycle to some extent by ___46___ staying up later than you want to . If your energy is ___47___ in the morning but you have an important job to do early in the day, ___48___ before your usual hour. This won’t change your cycle, but you’ll get up steam(打起精神) and work better ___49___.
Get off to a slow start ___50___ saves your energy. Get up with a yawn （呵欠）and ___51___ . Sit on the edge of the bed a minute before ___52____ on the floor. Avoid the ___53___ search for clean clothes by laying them out ___54___. Whenever possible , do routine （常规的）work in the afternoon and save tasks ___55____ more energy for your sharper hours .

A．impression B．explanation C．exploration D．translation

A．must B．should C．can D．may

A．at its bottom B．at its beginning C．at its end D．at its peak

A．why B．that C．whether D．whatever

A．as B．such as C．which D．like

A．steady B．occasional C．surprised D．possible

A．starts B．comes back C．ends D．turns around

A．life attitude B．energy cycle C．time table D．alarm o’clock

A．to do B．change C．fit D．to renew

A．anywhere B．no way C．anyway D．somewhere

A．sensitively B．especially C．carefully D．habitually

A．low B．high C．old D．new

A．go up B．rise C．lift D．raise

A．in your high spirit B．at the right time C．at your low point D．in the same way

A．which B．whichever C．what D．whatever

A．express B．attend C．open D．stretch

A．putting your feet B．setting your foot C．laying down your foot D．lying your feet

A．tired B．troublesome C．immediate D．dangerous

A．yesterday B．last night C．the night ago D．the night before

A．suggesting B．demanding C．requiring D．persuading