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G
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单项选择题
A．For the sake of their health.B．For the maintenance of the heating or the air-condition.C．To make best use of their resources.D．To make full use of the heating or the air-condition.
A．For the sake of their health.
B．For the maintenance of the heating or the air-condition.
C．To make best use of their resources.
D．To make full use of the heating or the air-condition.
填空题
J
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