问题描述：
Nowadays more and more people are moving to the countruside because the air there is much better...
Nowadays more and more people are moving to the countruside because the air there is much better than ____ in the city.
A:one B:it C:this D:that 为什么不选B啊?
Nowadays more and more people are moving to the countruside because the air there is much better than ____ in the city.
A:one B:it C:this D:that 为什么不选B啊?
问题解答：
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