问题
选择题
With less traffic and fewer factories, the air of the suburbs is much cleaner than ________ of the city.[ ]
A．those
B．one
C．that
D．it
答案
答案：C
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With less traffic and fewer factories, the air of the suburbs is much cleaner than ________ of the city.[ ]
A．those
B．one
C．that
D．it
答案：C