A、It is seriously polluted. B、The air is very clear. C、There are few cars and factories. D、It remains what it was ten years ago.

admin2008-11-28  29

问题  

选项 A、It is seriously polluted.
B、The air is very clear.
C、There are few cars and factories.
D、It remains what it was ten years ago.

答案A

解析
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