1) Does
he enjoy swimming, windsurfing, and diving?
What does he enjoy to do?
Who enjoys swimming, windsurfing, and diving?
He enjoys swimming, windsurfing, and diving, doesn't he?
Does he enjoy swimming, windsurfing and diving or reading?
2) Were
millions of brightly coloured fish moving busily around him?
How many brightly coloured fish were moving busily around him?
Where were millions of brightly coloured fish moving busily?
Millions of brightly coloured fish were moving busily around him, weren't they?
Were millions or hundreds of brightly coloured fish moving busily around him?