单项选择题

We have taken effective measures to preserve our natural resources.

A．protect
B．reserve
C．consume
D．save
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单项选择题
It has been revealed that some government leaders ill-used their authority and position to get illegal money for themselves.
A．employ
B．take
C．abuse
D．overlook
单项选择题
The doctors have abandoned the hope to rescue the old man.
A．left
B．given up
C．turned down
D．refused
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