问题
选择题
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
答案
答案：B
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。