One of the most important issue they had to consider in the UN climate conference in Copenhagen was

题目

One of the most important issue they had to consider in the UN climate conference in Copenhagen was ____ rich-poor cooperation on climate change.
A.one B.this C.that D.which
rich-poor cooperation on climate change是合作关系变化,还是气候变化啊?

答案

One of the most important issue they had to consider in the UN climate conference in Copenhagen was__that__ rich-poor cooperation on climate change.
主语是One of the most important issue
谓语是was
宾语是that,that的具体内容是 rich-poor cooperation on climate change.
they had to consider in the UN climate conference in Copenhagen 修饰的是主语issue
rich-poor cooperation on climate change是贫富国家之间关于气候变化的合作.