单项选择题

The steadily rising cost of labor on the waterfront has greatly increased the cost of shipping cargo by water.

A．gradually
B．suddenly
C．excessively
D．exceptionally
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A red flag was placed there as a token of danger.
A．sign
B．substitute
C．proof
D．target
单项选择题
The council meeting terminated at 2 o'clock.
A．began
B．continued
C．ended
D．resumed
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