历年六级完形填空真题1999 年 6 月大学英语六级(CET-6)真题试卷Part IV Cloze (15 minutes)Directions: There are 20 blanks in the following passage. For each blank there are four choices marked A), B), C) and D) on the right side of the paper. You should choose the ONE that best fits into the passage. Then mark the corresponding letter on the Answer Sheet with a single line through the centre.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 __61__ making mistakes. It is actually caused by __62__ of your “body clock”-a small cluster of brain cells that controls the timing of biological __63__. The body clock is designed for a __64__ rhythm of daylight and darkness, so that it is thrown out of balance when it __65__ daylight and darkness at the wrong times in a new time zone.The __66__ of jetlag often persist for days __67__ the internal body clock slowly adjusts to the new time zone Now a new anti-jetlag system is __68__ that is based on proven __69__ pioneering scientific research.Dr. Martin Moore-Ede has __70__ a practical strategy to adjust the body clock much sooner to the new time zone __71__ controlled exposure to bright light, The time zone shift is easy to accomplish and eliminates __72__ of the discomfort of jetlag. A successful time zone shift depends on knowing the exact time to either __73__ or avoid bright light. Exposure to light at the wrong time can actually make jetlag worse. The proper schedule __74__ light exposure depends a great deal on __75__ travel plans. Data on a specific flight itinerary (旅行路线) and the individual’s sleep __76__ are used to produce a Trip Guide with __77__...
