2. 外语
  3. We can eliminate pollution completely by the year of 2008. Once we thought of pollution as meaning simply______.

We can eliminate pollution completely by the year of 2008. Once we thought of pollution as meaning simply______.

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问题 We can eliminate pollution completely by the year of 2008.
Once we thought of pollution as meaning simply______.
选项
答案smog
解析 参考第4段第1句。
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大学英语六级

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