问题
选择题
Unfortunately, when I dropped in, Professor Smith ________, so we only had time for a few words.
A．has just left
B．had just left
C．just left
D．was just leaving
答案
答案：D
从“我们只谈了几句话”可知，当我们去拜访时，Professor Smith“正要”离开了，D是过去进行时表示过去将来意义。