填空题

57（）

【参考答案】

F
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单项选择题
You feel cool when you are near a lake or an ocean because （）

A．the water is cold
B．the earth is hot
C．the water is colder that the earth
D．the cool air from the water moves towards the land
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The increasing move to the cities of the people is thought to be （）

A．city pollution
B．population pollution
C．countryside pollution
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