2. 外语
  3. Most people who travel long distances complain of jetlag (喷气飞行时差反应). Jetlag makes business travelers less productive and more pr

Most people who travel long distances complain of jetlag (喷气飞行时差反应). Jetlag makes business travelers less productive and more pr

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问题    Most people who travel long distances complain of jetlag (喷气飞行时差反应). Jetlag makes business travelers less productive and more prone  【21】______  making mistakes. It is actually caused by  【22】______  of your “body clock” a small cluster of brain cells that controls the timing of biological  【23】______  The body clock is designed for a  【24】______  rhythm of daylight and darkness, so that is thrown out of balance when it  【25】______  daylight and darkness at the “wrong times in a new time zone. The  【26】______  of jetlag often persist for days  【27】______  the internal body clock slowly adjusts to the new time zone. Now a new antijetlag system is  【28】______  that is based on proven  【29】______  pioneering scientific research. Dr. martin Moore-Ede has  【30】______  a practical strategy to adjust the body clock much sooner to the new time zone  【31】______  controlled exposure to bright light. The time zone shift is easy to accomplish and eliminates  【32】______  of the discomfort of jetlag.
   A successful time zone shift depends on knowing the exact times to either  【33】______  or avoid brightlight. Exposure to light at the wrong time can actually make jetlag worse. The proper schedule  【34】______  light exposure depends a great deal on  【35】______  travel plans.
   Data on a specific flight itinerary(施行路线) and the individual’s sleep  【36】______  are used to produce a Trip Guide with  【37】______  on exactly when to be exposed to bright light.
   When the Trip Guide calls  【38】______  bright light you should spend time outdoors if possible. If it is dark outside, or the weather is bad,  【39】______  you are on an aeroplane, you can use a special light device to provide the necessary light  【40】______  for a range of activities such as reading, watching TV or working.
【38】
选项 A、off
B、instructions
C、for
D、commentaries
答案C
解析 本题要求考生选用恰当的副词和介词，与动词call构成动词短语。空格所在句子的意思是：“当这份旅行指南表明——亮光时，只要有可能，你就应当呆在户外”。填入表示“需要”之意的词语恰当。for能与call搭配，call for意为“要求，需要”，因此C项for是答案。call on意为“访问，拜访”，call off意为“取消”，call up有“打电话”之意，都与句意不合，因此B，A和D都不是答案。
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