The conference was attended by more than 11 000 people it the largest UN climate change

问题补充：

The conference was attended by more than 11,000 people, it the largest UN climate change gathering ever held.

A. making

B. to make

C. made

D. to be making

答案：

(答案→)A. making

B. to make

C. made

D. to be making

解析：考查非谓语动词。句意：出席会议的有超过11000人，使之成为联合国举办过的最大的气候会议。现在分词作状语表示正在进行的伴随性动作，和句子主语是主谓关系，故选A。