21.   Physical education classes were difficult at times, for Sean performed poorly in most competitive games.

22.   Small classes are a selling point for private schools.

23.   Social class is a major behavioural determinant of consumer buying behaviour, and its importance is widely acknowledged by Marketers.

24.   Social class is a major determinant of consumer spending patterns.

25.   Tap dance classes were not an enjoyable experience for a shy and introverted child.

26.   The class is full, but you can register for next term.

27.   The most familiar class of singularities are the scalar curvature singularities.

28.   The new class of trainees was highly motivated.