单项选择题

We must ______ our forests and woodlands for future generations.

A．reverse
B．reserve
C．conserve
D．convert
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单项选择题
The car stopped working on the way to the terminal because the battery ______.
A．ran across
B．ran off
C．ran down
D．ran over
单项选择题
Nothing could ______ his faith in human nature when he was a young boy.
A．eliminate
B．remove
C．extinguish
D．cancel
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