2. 外语
  3. A. while B. dark C. devised D. whereas E. specific F. agreeable G. regular H. stimulus I. disruption J. attain K. seek L

A. while B. dark C. devised D. whereas E. specific F. agreeable G. regular H. stimulus I. disruption J. attain K. seek L

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问题     A. while B. dark C. devised D. whereas E. specific
    F. agreeable G. regular H. stimulus I. disruption J. attain
    K. seek L. instructions M. spur N. formal O. available
    Most people who travel long distances complain of jetlag. Jetlag makes business travelers less productive and more prone to making mistakes. It is actually caused by【C1】______ of your "body clock"—a small cluster of brain cells that controls the timing of biological functions. The body clock is designed for a【C2】______ rhythm of daylight and darkness, so that it is thrown out of balance when it encounters daylight and darkness at the wrong times in a new time zone.
    The symptoms of jetlag often persist for days【C3】______ the internal body clock slowly adjusts to the new time zone. Now a new anti-jetlag system is【C4】______that is based on proven extensive pioneering scientific research.
    Dr. Martin Moore-Ede has【C5】______ a practical strategy to adjust the body clock much sooner to the new time zone through controlled exposure to bright light. The time zone shift is easy to accomplish and eliminates most of the discomfort of jetlag. A successful time zone shift depends on knowing the exact time to either【C6】______ or avoid bright light Exposure to light at the wrong time can actually make jetlag worse. The proper schedule for light exposure depends a great deal on 【C7】______ travel plans. Data on a specific flight itinerary and the individual’s sleep pattern are used to produce a Trip Guide with【C8】______ on exactly when to be exposed to bright light. When the Trip Guide calls for bright light you should spend time outdoors if possible. If it is【C9】______ outside, or the weather is bad, or you are on an aeroplane, you can use a special light device to provide the necessary light【C10】______ for a range of activities such as reading, watching TV or working.
【C8】
选项
答案L
解析 此处应填入名词，作介词on的宾语。结合空格前的Trip Guide(旅行指南)以及空格后的“关于何时接触强光”，推断空格处应该填“指导，说明”含义的词，故选L。
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