题目

______ around the fire, the tourists danced with the local people.                                                                                                                                                                                                       A. Gather                               B. To gather     C. Gathering                  �阅读“海河水系图”和“海河各支流径流特征值”回答下列各题：1.分析表中数据后判断，永定河为图中A．① B．② C．③ D．④2.各支流径流年际变化的大小不同，与之相关不大的因素是A．集水面积 B．统计年数 C．植被状况 D．夏季风强弱