Part   Ⅳ   Cloze  (15 minutes, 15 points, 1 for each)

　　Directions: In this part, there is a passage with 15 blanks. For each blank there are 4 choices marked A, B, C and D. Choose the best answer for each blank and mark the corresponding letter on your ANSWER SHEET with a single line through the center.

　　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 disruption of your "body clock"一 a small cluster of brain cells that controls the timing of biological __62__. The body clock is de-signed for a __63__ rhythm of daylight and darkness, so that it is thrown out of balance when it experiences daylight and darkness at the "wrong" times in a new time zone. The __64__of jetlag often persist for days __65__ the internal body clock slowly adjusts to the new time zone.

　　Now a new anti-jetlag system is __66__ that is based on proven extensive pioneering scientific research.

　　Dr. Martin Moore-Ede has devised a practical strategy to adjust the body clock much sooner to the new time zone __67__ controlled exposure to bright light. The time zone shift is easy to accomplish and eliminates __68__ of the discomfort of jetlag.

　　A successful time zone shift depends on knowing the exact times to either __69__ or avoid bright light. Exposure to light at the wrong time can actually make jetlag worse. The proper schedule __70__ light exposure depends a great deal on__71__ travel plans.

　　Data on a specific flight itinerary (旅行路线) and the individual's sleep__72__are used to produce a Trip Guide with__73__on exactly when to be exposed to bright light.

　　When the Trip Guide calls __74__ bright light you should spend time outdoors if possible. If it is dark outside, or the weather is bad, __75__ you are on an aero plane, you can use a special light device to provide the necessary light stimulus for a range of activities such as reading, watching TV or working.

　　61. A. for  B. from   C. to   D. of

　　62. A. actions  B. functions  C. reflection  D. behavior

　　63. A. regular  B. formal  C. continual  D. circular

　　64. A. diseases  B. symptoms  C. signs   D. defects

　　65. A. while  B. whereas  C. if   D. although

　　66. A. adaptable  B. approachable  C. available  D. agreeable

　　67. A. at  B. through  C. in   D. as

　　68. A. most  B. least   C. little   D. more

　　69. A. attain  B. shed   C. retrieve  D. seek

　　70. A. on  B. with   C. for   D. in

　　71. A. unique  B. specific  C. complicated  D. peculiar

　　72. A. norm  B. mode   C. pattern  D. style

　　73. A. directories B. instructions  C. specifications  D. commentaries

　　74. A. off  B. on   C. for   D. up

　　75. A. or  B. and   C. but   D. while

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