Most people who travel long distances complain of jetlag. Jetlag makes business travelers
Now a new anti-jetlag system is【C8】______ that is based on proven【C9】______ pioneering scientific re- search. Dr. Martin Moore-Ede has【C10】______ a practical strategy to adjust the body clock much sooner to the new time zone【C11】______ controlled exposure to bright light. The time zone shift is easy to accomplish and eliminates【C12】______ of the discomfort of jetlag. A successful time zone shift depends on knowing the exact times to either【C13】______ or avoid bright light. Exposure to light at the wrong time can actually make jetlag worse. The proper schedule【C14】______ light exposure depends a great deal on【C15】______ travel plans.
Data on a specific light itinerary and the individual's sleep【C16】______ are used to produce a Trip Guide with【C17】______ on exactly when to be exposed to bright light. When the Trip Guide calls【C18】______ bright light you should spend time outdoors if possible. If it is dark outside, or the weather is bad,【C19】______ you are on an aeroplane, you can use a special light device to provide the necessary light【C20】______ for a range of activities such as reading, watching TV or working.
【C1】
A.for
B.from
C.to
D.of