单项选择题

The train ads were placed among family-oriented TV programs involving nature and America because______ .

A．they could focus on meaningful travel experiences,
B．they could increase the effectiveness of the TV programs
C．their profits could be increased by some 15 percent
D．most travel-lovers and nervous fliers were believed to be among the audiences
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单项选择题
It can be inferred from the passage that the drop in Amtrak ridership was due to the fact that
A．trains were not suitable for short distance passenger transportation
B．trains were not the fastest and most convenient form of transportation
C．trains were not as fast and convenient as they used to be
D．trains could not compete with planes in terms of luxury and convenience
单项选择题
What's the author's purpose in writing this passage
A．To show the inability of trains to compete with planes with respect to speed and convenience.
B．To stress the influence of the automobile on America's standard of convenience.
C．To emphasize the function of travel agencies in market promotion.
D．To illustrate the important role of persuasive communication in changing consumer attitudes.
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