Most people who travel long distances complain of jetlag. Jetlag makes bus

游客2024-10-29 13

问题    Most people who travel long distances complain of jetlag. Jetlag makes business travelers less productive and more prone【C1】______ making mistakes. It is actually caused by【C2】______ of your "body clock"— a small cluster of brain cells that controls the timing of biological【C3】______ . The body clock is designed for a【C4】______ rhythm of daylight and darkness, so that it is thrown out of balance when it【C5】______ daylight and darkness at the "wrong" times in a new time zone. The【C6】______ of jetlag often persist for days 【C7】______ the internal body clock slowly adjusts to the new time zone.
   Now a new anti-jetlag system is【C8】______ that is based on proven【C9】______ pioneering scientific re- search. Dr. Martin Moore-Ede has【C10】______ a practical strategy to adjust the body clock much sooner to the new time zone【C11】______ controlled exposure to bright light. The time zone shift is easy to accomplish and eliminates【C12】______ of the discomfort of jetlag. A successful time zone shift depends on knowing the exact times to either【C13】______ or avoid bright light. Exposure to light at the wrong time can actually make jetlag worse. The proper schedule【C14】______ light exposure depends a great deal on【C15】______ travel plans.
   Data on a specific light itinerary and the individual’s sleep【C16】______ are used to produce a Trip Guide with【C17】______ on exactly when to be exposed to bright light. When the Trip Guide calls【C18】______ bright light you should spend time outdoors if possible. If it is dark outside, or the weather is bad,【C19】______ you are on an aeroplane, you can use a special light device to provide the necessary light【C20】______ for a range of activities such as reading, watching TV or working. [br] 【C13】

选项 A、attain
B、shed
C、retrieve
D、seek

答案 C

解析 retrieve意为“重新得到，取回，收回；挽回，补救”，例如：We must retrieve our losses somehow，or we shall go bankrupt．我们无论如何也得挽回损失，否则就要破产。attain作“达到，获得”讲，例如：That you had attained your goal without the slightest difficulty really surprised me．你竟然毫无困难地实现了你的理想，真让我惊奇。shed意为“脱落，脱去；流出，流

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