单项选择题

"to degas the lake" in the third paragraph means ______.

A．to remove gas from the lake
B．to inflate gas into the lake
C．to purify the lake
D．to exploit the lake to produce gas
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单项选择题
The author most likely agrees that ______.
A．better city, better life
B．both urban and rural areas have their advantages
C．the larger population, the faster a city develops
D．both urban and rural areas have their problems
单项选择题
What will happen in the year of 2030
A．There will be 21 cities having a population of more than 10 million.
B．Rural area will be extinct.
C．Most people will live in cities.
D．The third world will keep abreast with the developed worl
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