41.   What a difference a quarter makes.

42.   What a difference a quarter-century can make.

43.   What a difference a successful speech, a surging economy, a news media counteroffensive, and an averted war can make.

44.   What a difference a week makes!

45.   What a difference a word makes.

46.   What a difference a year has made.

47.   What a difference a year made.

48.   What a difference an energy crisis makes.