Unfortunately, when I dropped in, Dr. Green , so we only had time for a few words.
A. just left
B. has just left
C. had just left
D. was just leaving
网友回答
A. just left
B. has just left
C. had just left
(答案→)D. was just leaving
解析：考查时态：句意：不幸的是，当我拜访的时候，格林先生刚要走，所以我们只有时间说几句话。所以在我去的时候，格林先生还没走，ABC都不对，而是将要走，用过去进行时，表示过去将来时，选D。