单项选择题

The high ______ of road accidents on the super high way is giving cause for serious concern.

A．coincidence
B．occurrence
C．circumstance
D．occasion
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单项选择题
The president's fitful rule is seen to be even more de signed to serve the interests of people ______.
A．at a loss
B．at a stroke
C．at large
D．at hand
单项选择题
Many animals will become ______ because they don't have good habits in living.
A．feeble
B．extinct
C．massive
D．extinguished
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