Mr．Zhang ________ here for almost 20 years, yet he hasn't had an accident．
A.was drivingB.had drivenC.has been drivingD.will be driving在线课程C
解析：
考查动词时态。由时间状语for almost 20 years可知此处是时间段，且强调动作的持续性，应用现在完成进行时，选C。难度适中。