2. 外语
  3. If developing countries want to prevent the growth of environmental refugees, it is absolutely essential that __________________

If developing countries want to prevent the growth of environmental refugees, it is absolutely essential that __________________

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问题 If developing countries want to prevent the growth of environmental refugees, it is absolutely essential that ____________________(保持可持续发展以及提供良好的输水系统).
选项
答案sustainable development and adequate water delivery systems be maintained
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大学英语六级

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