2. 外语
  3. Most people who travel long distances complain of jetlag (飞行时差综合症). Jetlag makes business travelers less productive and more pro

Most people who travel long distances complain of jetlag (飞行时差综合症). Jetlag makes business travelers less productive and more pro

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问题    Most people who travel long distances complain of jetlag (飞行时差综合症). 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 it 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 anti-jetlag 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 bright light. 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 (旅行路线) 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 aero plane, 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.
【24】
选项 A、regular
B、formal
C、continual
D、circular
答案A
解析 从常识可知，昼夜更迭是有规律的，这种规律性循环往复，因此"a regular rhythm of daylight and darkness"是通顺的，A项regular为正确答案。D项cir cular意为“循环的”，虽然昼夜交替也循环往复，但空格所修饰的名词rhythm本身就含“循环”之意，选项C“连续不断的”显然与上下文意思不符，生物钟不是用来使人适应连续的昼夜更迭的，B项formal则不能与rhythm搭配使用。
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