Question

To my great disappointment, ________ I got to the airport, the guests had left．

1. A.
   while
2. B.
   as
3. C.
   after
4. D.
   when

Answer 1

D
句意：我感到很沮丧的是，当我到了车站的时候，客人都已走了。when在此句表示时间点，与瞬间动词连用。