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.