【题目】It's nearly four years since I worked in that farm. I ________ a band with other fellows.
A.operated
B.had been operating
C.was operating
D.am operating

【答案】D
【解析】考查时态。句意：我在那家农场上班快四年了，我现在正和其他伙伴经营一个乐队。根据句意可知，用现在进行时态，故选D。