Questions to the subject:
1) Who operates on people?
2) Who is a vet?
3) Who works in the hospital?
General questions:
1) Does a vet work with animals?
2) Have you got a stomachache?
3) Did the surger operated on you yesterday?
Disjunctive questions:
1) There is a stethoscope on the table, isn't there?
2) Doctors usually take your temperature first, don't they?
3) It is true you should take an aspirin in case of a headache, isn't it?
Alternative questions:
1) Is it dangerous or safe to be a vet?
2) Do dentists treat your teeth or legs?
3) Do most people like or hate dealing with doctors?