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.
【C4】
选项
答案O
解析 空格前的is提示空格处要么填入形容词作表语，要么填入动词分词。此处的句意为“应对时差反应的方法现在________了”。下一段描述Martin Moore-Ede博士的策略时用了practical“实用的”，这说明该方法现在是可用的，词库中的available“可利用的”符合要求。practical“实用的”和agreeable“令人愉快的”是不能等同的，故排除F。
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