I forgot to include the following statements.

Question

1) Answer four out of (or just "of") the following six questions.
2) do you usually use do with the following sports activities: aerobics, athletics, karate, ballet
3) go + cycling, water rafting, paragling (? or do), parachuting, mountain climbing, horse riding, surfing, snowboarding, skating, dancing

Thank you very much.

Answer 1

#1 -- just "of" is fine

#2 -- yes

#3 -- "go" works with all these, yes [Do you mean "paragliding"? I don't know what "paragling" is.]