单项选择题

A．To protect environment.
B．To cool buildings.
C．To change the climates.
D．To provide drinking water.
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单项选择题
A．He had not expected such a bold question from Pat.B．He wondered why Pat didn’t run away.C．Pat wasn’t afraid of him.D．Pat had a gun in his hands.
A．He had not expected such a bold question from Pat.
B．He wondered why Pat didn’t run away.
C．Pat wasn’t afraid of him.
D．Pat had a gun in his hands.
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