问题
选择题
Now the air in our hometown is even than it was before. So we must do something to stop it. [ ]
A. dirty
B. better
C. worse
D. dirtiest
答案
答案：C
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Now the air in our hometown is even than it was before. So we must do something to stop it. [ ]
A. dirty
B. better
C. worse
D. dirtiest
答案：C