Most people who travel long distance complain of jetlag.Jetlag makes business travelers less productive and more prone【C1】______

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问题     Most people who travel long distance complain of jetlag.Jetlag makes business travelers less productive and more prone【C1】______making mistakes.It is actually caused by disruption of your "body clock’’—a small cluster of brain cells that controls the timing of biological【C2】______.The body clock is designed for a regular rhythm of daylight and darkness, so that it is thrown out of balance when it【C3】______daylight and darkness at the "wrong" times in a new time zone.The【C4】______of jetlag of ten persist for days while the internal body clock slowly adjusts to the new time zone.
    Now a new anti-jetlag system is【C5】______that is based on proven【C6】______pioneering scientific research.Dr.Martin Mooreede had devised a practical strategy to adjust the body clock much sooner to the new time zone【C7】______controlled exposure to bright light.The time zone shift is easy to accomplish and eliminates【C8】______of the discomfort of jetlag.
    A successful time zone shift depends on knowing the exact times to either【C9】______or avoid bright light.Exposure to light at the wrong time can actually make jetlag worse. The proper schedule for light exposure depends a great deal on【C10】______travel plans.
【C2】

选项 A、actions
B、functions
C、behavior
D、reflection

答案B

解析 本句可译为:“生物钟是指控制生理功能时间的脑细胞群。”A项action意为“行为,行动”,通常指具体的“作为”。B项function可以指人体,或者是机器的“运转,发挥功效”。C项behavior意为“举止,行为”,侧重于人们行事的方式。D项reflection意为“反射,沉思”,显然和本句意思不符。
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