22. By the time the police get there, the burglars ... .
b) will have vanished
23. As soon as the taxi arrives, I ... you know.
c) will let
24. My friend has been writing to me for years already, but he never ... a photo.
c) has sent
25. Why are you busy packing? - My train ... in two hours, so we'll leave the house in an hour.
b) leaves