2. 外语
  3. A. while B. dark C. devised D. whereas E. specific F. agreeable G. regular H. stimu

A. while B. dark C. devised D. whereas E. specific F. agreeable G. regular H. stimu

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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.
【C1】
选项
答案I
解析 空格前为介词by，而空格后为介词短语of your “body clock”，故判断空格处应填入名词，作介词by的宾语。根据常识可知，时差反应当然是由体内“生物钟”被打乱引起的，词库中的disruption“扰乱”，符合语境。
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