2. 外语
  3. Facing a potential climate disaster, the world’s governments agreed to limit a global rise in 【B1】______ temperature by the end

Facing a potential climate disaster, the world’s governments agreed to limit a global rise in 【B1】______ temperature by the end

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问题     Facing a potential climate disaster, the world’s governments agreed to limit a global rise in 【B1】______ temperature by the end of this century to prevent the frightening effects of global warming.
    But they face a huge task to meet that【B2】______, the world’s top climate scientists said Sunday, with data showing that efforts have【B3】______.
    Global greenhouse gas emissions【B4】______ to "unexampled levels" during the decade that ended four years ago, despite efforts to limit carbon from sources such as power plants and【B5】______ factories, as well as deforestation(森林开伐).
    At a meeting in Berlin, the U.N. Intergovernmental Panel on Climate Change(IPCC)on Sunday 【B6】______ a report that found that nations still have a chance to fulfill the goal but must【B7】______ turn away from relying largely on fossil fuels such as coal for energy and【B8】______ cleaner energy sources such as solar and wind power. To reach their target of 3.6 degrees(2 degrees Celsius)over【B9】______ levels, nations must work together to lower emissions "by 40 to 70 percent" of what they were in the end of the previous decade, the report said.
    Without such action before mid-century, scientists said, nations will start to face the most debilitating(削弱的)effects of global warming—rapidly【B10】______ arctic ice, significant sea-level rise, flooding and storms—by the end of the century.
【B3】
选项
答案fallen well short
解析 此空需填入过去分词成分，与空格前的have构成从句中的谓语部分。fall well short“远远不足”，此处是完成时，fall勿忘了用过去分词fallen。
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