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单项选择题
What does the first sentence imply
A．It is not really an enlightened age.
B．It is different from an enlightened age.
C．It is the same as an enlightened age.
D．It is like an enlightened age.
单项选择题
Why does the author mention both Boston and Chicago
A．To demonstrate positive and negative effects of growth.
B．To exemplify cities with and without mass transportation.
C．To show mass transportation changed many cities.
D．To contrast their rate of growth.
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