The meeting was ______ over by the mayor to discuss the tax raise in the city.

【正确答案】 C

【答案解析】 句意：会议由市长主持，讨论该市税收增加的问题。preside over“主持”，符合题意。presume假设，推测。propel推进，激励；prick刺，刺痛。根据词义可知C项为正确答案。