【题目】I graduated from college twenty years ago and I ____________ as an English teacher in this middle school ever since.
A. worked B. have been working
C. had worked D. was working
在线课程【答案】B
【解析】考查时态：句意：20年前我从大学毕业，自从那时起，我就在这个中学做英语老师。可知做英语老师是自从我从大学毕业到现在，用现在完成进行时。选B。