单项选择题

A．Separating the fire.
B．Reducing the heat.
C．Removing the fuel
D．Cutting off the oxygen.
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单项选择题
A．Skiing.B．Skating.C．Swimming.D．Jogging.
A．Skiing.
B．Skating.
C．Swimming.
D．Jogging.
单项选择题
A．Two hundred dollars.B．Three hundred dollars.C．Two thousand dollars.D．Three thousand dollars.
A．Two hundred dollars.
B．Three hundred dollars.
C．Two thousand dollars.
D．Three thousand dollars.
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