41.   Has his technique improved over time?

42.   He improved over time but never sparkled.

43.   His attempts at humor have improved over time.

44.   His English, much improved over his decade in the spotlight, is carefully chosen.

45.   Health care in Texas prisons has improved over the years.

46.   Her Olympic experience did not improve over the fortnight.

47.   I improved over the years, including the use of a piano bench for a coffee table, but eventually switched to antiques.

48.   In all but four countries, large majorities said the position of women compared with that of men had improved over the past five years.

49.   In fact, the Revolution have improved over last season.

50.   In fact, while some of the homes are shanties with leaky roofs and even dirt floors, many others have been painstakingly improved over the years.