单项选择题

A．To wear jackets to work.
B．Nut to use air-conditioners.
C．To wear shirt sleeves.
D．To take all measures to conserve energy.
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单项选择题
A．Driving a car.B．Taking a taxi.C．Going by train.D．Taking the subway.
A．Driving a car.
B．Taking a taxi.
C．Going by train.
D．Taking the subway.
单项选择题
A．Begging food from the tourists.B．Attacking the tourists.C．Dropping wastes on the tourists.D．Making loud noise to disturb the tourists.
A．Begging food from the tourists.
B．Attacking the tourists.
C．Dropping wastes on the tourists.
D．Making loud noise to disturb the tourists.
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