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 pro

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问题     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【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【C3】______rhythm of daylight and darkness, so that it is thrown out of balance when it【C4】______daylight and darkness at the "wrong" times in a new time zone. The symptoms of jetlag often persist for days【C5】______the internal body clock slowly adjusts to the new time zone.
    Now a new anti-jetlag system is【C6】______that is based on proven tentative pioneering scientific research. Dr. Martin Moore Ede had【C7】______a practical strategy to adjust the body clock much sooner to the new time zone through 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.
【C4】

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

答案C

解析 依据句意,“at the‘wrong’time in a new time zone”(在一个新时区感到一个“不正常”的时间),应选择C为正确答案。encounters一词指“偶然地、短暂地遭遇到”。其他三项词义:A项experiences意为“经验,经历”;B项possesses意为“拥有,占有,支配”;D项retains意为“保留,保持”。
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