【题目】The Belt and Road Forum, ______ about 1000 experts have attended, focuses on the goal of promoting common development and prosperity.
A.whereB.whenC.thatD.which
在线课程【答案】D
【解析】
考查定语从句。句意：约1000名专家参加了“一带一路”论坛，论坛的主题是促进共同发展和繁荣。此处The Belt and Road Forum是先行词，指物，放在后面的定语从句中作attend的宾语，且that不能引导非限制性定语从句，应该用which。故选D。