around the fire, the tourists danced with the local people.
A. Gather
B. To gather
C. Gathering
D. To be gathering
网友回答
A. Gather
B. To gather
(答案→)C. Gathering
D. To be gathering
解析：考查非谓语，表示时间状语从句。根据句子意思“围在火堆边，游客和当地人跳起舞来。因此选C。to do不定式表示目的， to be doing 一般做表语。