Mike used to live near the airport, and there was a plane that took off at 7:00 every day. So Mike always closed every window in the house at 6:55. Mike moved last year, and his new house isn’t near the airport. But, he still closes the windows at 6:55. It’s sort of funny to watch.

A.
Strike while the iron is hot.

B.
Once bitten, twice shy.

C.
Old habits die hard.

D.
The leopard cannot change its spots.