2. 外语
  3. We can eliminate pollution completely by the year of 2008. ______is beginning to threaten our health, our happiness and our civ

We can eliminate pollution completely by the year of 2008. ______is beginning to threaten our health, our happiness and our civ

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问题 We can eliminate pollution completely by the year of 2008.
______is beginning to threaten our health, our happiness and our civilization.
选项
答案pollution
解析 第3段最后一句，污染正开始在威胁我们的健康、幸福和文明。
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大学英语六级

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