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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单项选择题

The increasing move to the cities of the people is thought to be （）.

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

单项选择题

56（）

A. Can I help you
C. Safety belt, please.
E. Is there anything serious
G. What flight are you taking
B. We are taking off at last.
D. The engine went wrong.
F. Just a moment, please.
H. It should be OK in an hour.