They sat face to face, _____ about the things they were interested in for a long time. [ ]

A. and talk

B. talking

C. to talk

D. talked

第三世界的形成与发展是与殖民体系瓦解和民族解放运动紧密相连的，标志第三世界崛起的重要里程碑是（）

A.万隆会议

B.欧佩克的建立

C.不结盟运动

D.七十七国集团

E.联合国贸易发展