Mr. Irving, who ____ in a high school fo
题型:选择题
问题:
Mr. Irving, who ____ in a high school for forty years, is now living in retirement. [ ]
A. has taught
B. taught
C. had taught
D. has been teaching
Mr. Irving, who ____ in a high school for forty years, is now living in retirement. [ ]
A. has taught
B. taught
C. had taught
D. has been teaching