Question

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

Answer 1

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。