单项选择题

The main idea of the passage is that ______.

A．Americans are too attached to their cars
B．public transportation in America is well-developed
C．American cars are too fast
D．automobiles endanger health
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单项选择题
From Paragraph 3 we know that ______.
A．technology is always good for people
B．technology is not always good for people
C．financial profit is more important than technological advancement
D．American people care about both environment pollution and technological development
单项选择题
According to Dr. Weinerman, the solution is ______.
A．a fuel less dangerous than gasoline must be found
B．people should get rid of their cars and take the bus to work
C．one family should own just one car
D．public transportation should be improved so that people can become less dependent upon their cars for inner-city transportation
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