Mr. Irvine, who in a high school for forty years, is now living in retirement.
A. had taught
B. taught
C. has taught
D. had been teaching
网友回答
A. had taught
(答案→)B. taught
C. has taught
D. had been teaching
解析：考查 动词的时态。根据is now living in retirement，可知他在高中工作四十年是发生在过去，所以要用一般过去时态。选B。