单项选择题

According to the passage, the cost increase in the rail industry is mainly caused by ______.

A．the continuing acquisition
B．the growing traffic
C．the cheering Wall Street
D．the shrinking market
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单项选择题
In the third paragraph, the example in Manhattan is taken from the business of ______.
A．gold market
B．real estate
C．stock exchange
D．venture investment
单项选择题
The word arbiters ( Line 6, Para. 4) most probably refer to those ______.
A．who work as coordinators
B．who function as judges
C．who supervise transactions
D．who determine the price
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