单项选择题

The word "desalination" in the last sentence may mean______ .

A．river freezing
B．iceberg forming
C．removing salt from water
D．iceberg floating
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单项选择题
The word it in line 2 refers to______ .
A．an iceberg that is towed
B．obtaining fresh water from icebergs
C．the population of arid areas
D．real life
单项选择题
According to the author, most of the world's fresh water is to be found in______ .
A．oceans
B．rivers
C．glaciers
D．reservoirs
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