A、David and Margaret once worked together. B、Margaret’s mother likes David very much. C、Two old friends met unexpectedly. D、Davi

W: Can you recognize me, David?
M: Why, are you Margaret?
W: Sure, I am. We haven’t seen each other for over twenty years.
M: You haven’t changed so much.
W: You haven’t either.
M: Remember the days when we were together? We used to go out for a walk every evening after supper.
W: And my mother used to say that we are more like brother and sister than friends.
M: Those good old days!