общие
1 Do they have to pay for their education?
2 Are many classes equipped with projectors?
3 Does their teacher arrange excursions for them?
альтернативные
1 Do they have to pay for their education or for their books?
2 Are many classes equipped with projectors or computers?
3 Does their teacher arrange excursions or concerts for them?
специальные
1 What do they have to pay for?
2 What are many classes equipped with?
3 What does their teacher arrange for them?
разделительные
1 They have to pay for their education, don't they?
2 Many classes are equipped with projectors, aren't they?
3 Their teacher arranges excursions for them, doesn't she/he?
к подлежащему
1 Who has to pay for the education?
2 What is equipped with projectors? или What classes are
equipped with projectors?
3 Who arranges excursions for them?