【题目】It’s nearly four years since I worked in that firm. I ________ a band with other fellows.
A. operatedB. had been operating
C. was operatingD. am operating
在线课程【答案】D
【解析】
试题分析：考查动词的时态。句意：我在那家公司工作已经快四年了。现在我跟几个伙伴经营一支乐队。since I worked in that firm说明“我”已经离开了那家公司。因此经营乐队是现在的事，应用现在进行时，故选D项。