单项选择题

A．To wear jackets to work.
B．Not 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．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.
单项选择题
A．Increase food production.B．Increase oil production.C．Birth control.D．All of above.
A．Increase food production.
B．Increase oil production.
C．Birth control.
D．All of above.
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