61.   Air quality has improved substantially in recent decades for everyone.

62.   Customer service quality improves tremendously.

63.   Ford Chairman Alex Trotman said the automaker exceeded all of its financial goals, as revenues grew, automotive returns were up and quality improved.

64.   He added that the quality of refereeing improved because the two referees indirectly kept an eye on one another.

65.   In fact, asthma deaths have increased at the same time air quality has improved.

66.   The air quality improved today.

67.   Trade barriers gradually rose, and Japanese car quality improved dramatically.