51.   The ethanol key would be a little broader, fitting in a whole class of bacteria that produce alcohol.

52.   The great Russian playwright wrote about depressed, relatively well-off country folks in the era just before their whole class was swept away by communism.

53.   The president welcomed the recent release of several well-known dissidents, but said that he now looked to Beijing to release whole classes of prisoners.

54.   The whole class is on a campaign to stop them from smoking and drinking.

55.   The whole class titters and gets back to sawing away on their instruments.

56.   The whole class started tittering and laughing.

57.   The whole class saw my Wednesday underwear with the tear at the waistband when my dress flew up.

58.   Then we watch, the whole class, and we criticize together.

59.   The whole class can.

60.   There is a whole class of Americans who love this kind of car.