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2. Why were overhead bridges built in Beijing?
A. Because they prevent traffic from being held up.
B. Because they provide an easy way for the drivers to cross the road.
C. Because they save money for the government.
D. Because they save time for the pedestrians.
A. Because they prevent traffic from being held up.
B. Because they provide an easy way for the drivers to cross the road.
C. Because they save money for the government.
D. Because they save time for the pedestrians.
参考答案