问题

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
B:had just left
C:just left
D:was just leaving
正确答案是:
同类题型
I’m so busy that I can’t ______ the time for a holiday at present.
More chances _____ for students to learn from each other if they work in groups.
Tommy and I _________good friends.
Sandy is my best friend. Her hair long.
Parents,of course,will do everything they could to ________ their children from harm.[ ]