President Obama held talks with Chinese President Hu Jintao in Beijing, economic recovery, climate change and stopping the spread of nuclear weapons.
A. which was discussed
B. in which they-discussed
C. when they discussed
D. which discussed
网友回答
A. which was discussed
(答案→)B. in which they-discussed
C. when they discussed
D. which discussed
解析：考查非限制性定语从句。句意“奥巴马总统和胡锦涛主席在北京举行了多次谈话，谈话中，他们讨论了经济复苏，气候变化和阻止核武器扩散等问题。”先行词是talks，从句缺少地点状语，in which相当于where。故选B。