2. 外语
  3. ______burning coal, oil and gasoline are responsible for the globing warming? ______green roofs help reduce energy use by escap

______burning coal, oil and gasoline are responsible for the globing warming? ______green roofs help reduce energy use by escap

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问题 ______burning coal, oil and gasoline are responsible for the globing warming?
______green roofs help reduce energy use by escaping from high temperature?
选项 A、 
B、 
C、 
D、 
答案B
解析 green roof是主题词，在B中可以找到。
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