单项选择题

A．Strip-cities.
B．Transportation of the future.
C．Energy conservation.
D．Advantages of air transportation over railroads.
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单项选择题
The word prevalent (Sentence 1, Para. 1)in this passage means
A．current
B．famous
C．notorious
D．acceptable
单项选择题
What is the passage mainly about
A．The intellectual development of American schools.
B．The independence of American schools from Europe.
C．The central control of American schools.
D．The role of local authority in American schools.
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