单项选择题
Exercise: You are going to listen to a passage about the
effect of jet lag. Listen carefully and then choose the best answer to each of
the following questions. Remember you will hear the passage only
once.
According to the report, why did researchers study jet lag in baseball
- A. Because they think people are usually very interested in sports.
B. Because they are not interested in how jet lag affects businesspeople.
C. Because baseball teams want to know how to win more games.
D. Because it is difficult to measure how jet lag affects other types of travelers.
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In his traveling experience, the man has been in hurricanes, tornados, seen tidal waves, volcanoes erupting, and been involved in a plane crash. -
单项选择题
Which means of transportation will be the most important method of getting around in the twenty-first century
A. Airplanes.
B. Trains.
C. Cars. -
单项选择题
According to the article, in the twenty-first century an American businessman will spend less than ______ to go to Paris.
A. three hours
B. four hours
C. five hours
