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【C10】______specific travel plans.
【C3】

选项 A、contains
B、possesses
C、retains
D、encounters

答案D

解析 文中该处意为:“它(生物钟)到了一个新的时区,经历了时间错乱的白天和黑夜,就会失去平衡。”D项意为“遭遇,遇到”。
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