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.