单项选择题

A．I hour.
B．2 hours.
C．3 hours.
D．Four hours.
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单项选择题
A．To enjoy some sunbathing.B．To take a hot bath.C．To get some sleep.D．To run downstairs and relax.
A．To enjoy some sunbathing.
B．To take a hot bath.
C．To get some sleep.
D．To run downstairs and relax.
单项选择题
A．It will reduce the amount of pollutants in the air.B．It will increase the amount of unpleasant odors from vehicles.C．It will eventually destroy the ozone layer.D．It will reduce the cost of running large vehicles.
A．It will reduce the amount of pollutants in the air.
B．It will increase the amount of unpleasant odors from vehicles.
C．It will eventually destroy the ozone layer.
D．It will reduce the cost of running large vehicles.
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