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1. 句子：In his classic novel, "The Pioneers", James Fenimore Cooper has his hero, a land developer, take his cousin on a tour of the city he is building.
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2. 句子：While regular schools still exist, the virtual classroom plays an increasingly important role in today's educational community.
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3. 句子：The fact that ordinary citizens are now starting to think seriously about the nation's moral climate, says this ethics professor at the University of Chicago, is reason to hope that new ideas will come forward to improve it.
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4. 句子：It is a plan that has been hailed by many environmentalists as a possible model for other cities, and one that could, if implemented, significantly reduce traffic congestion and air pollution.
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5. 句子：What emerged from the 2008 financial crisis was a widespread recognition that the global economy, though interconnected, is far more fragile than previously thought.
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6. 句子：Not only did the researchers find that students who took notes on laptops performed worse on conceptual questions, but they also discovered that the act of typing notes verbatim reduced understanding.
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