问题
选择题
| With more factories and traffic, the air of the city is much dirtier than _____ of the suburbs. |
A. it B. that C. one D. those |
答案
答案：B
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| With more factories and traffic, the air of the city is much dirtier than _____ of the suburbs. |
A. it B. that C. one D. those |
答案：B
