问题
选择题
When I dropped in, Dr Smith _____, so we only had time for a few words. [ ]
A. just left
B. was just leaving
C. has just left
D. had just left
答案
答案：B
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When I dropped in, Dr Smith _____, so we only had time for a few words. [ ]
A. just left
B. was just leaving
C. has just left
D. had just left
答案：B