1)
1 Are you skating?
2 Are you playing hopscotch?
3 Are you singing a song?
3 Are you playing hockey?
4 Are you watching TV?
2)
1 Is he playing a computer game?
2 Is he playing hide-and-seek?
3 Is he playing with a ball?
4 Is he skiing?
3)
1 Is she dancing?
2 Is she swimming?
3 Is she skipping?
4 Is she drawing?
5 Is she running?
6 Is she making a cake?
7 Is she playing?
4)
1 Are they eating?
2 Are they playing snowballs?
3 Are they playing the piano?
4 Are they writing?
5 Are they making ships?
6 Are they playing in the park?