It was obvious that the Climate Change Conference in Copenhagen the global environmental problems.
A. aimed on
B. focused on
C. intended for
D. mented on
网友回答
A. aimed on
(答案→)B. focused on
C. intended for
D. mented on
解析： A瞄准，目的在于；B聚焦；集中注意力于…；C打算，意图；D评论…；句义：很清楚哥本哈根气候大会聚焦于全球变暖的问题。根据句义说明B正确。