Unluckily, when I dropped in, Dr. Smith , so we only had time for a few words.
A. was just leaving
B. has just left
C. had just left
D. just left
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(答案→)A. was just leaving
B. has just left
C. had just left
D. just left
解析:考查时态。句意:不幸地是,当我来的时候,斯密斯博士正要出去,所以我们只有时间说了几句话。根据句意可知他还没有离开,但是正要离开,故使用过去进行时表示过去将来时。故A正确。