问题补充:
—Did you meet the professor at the airport?
—No,he by the time I there.
A. had left;got
B. has left;reached
C. was leaving;got
D. left;had got
答案:
(答案→)A. had left;got
B. has left;reached
C. was leaving;got
D. left;had got
解析: 根据上文,下文叙述应是过去时态。根据下文时间状语,我到那时,他已离开了,选A.