题目

被人们称为“巨河之洲”的大洲是（   ） A、亚洲       B、非洲     C、南美洲       D、北美洲 答案：A________ global temperatures rising, the UN Climate Change Conference was held in Cancun（坎昆）, Mexico last year．A．PreventedB．PreventingC．Having preventedD．To prevent