Put four types of questions to the sentences.
1. Helen`s parents are programmers.
2. There is a TV-set in this class.
3. My friend has two uncles and four aunts.
4. My father visits a dentist twice a year.
5. The students learn subjects on specialties.

1. Helen`s parents are programmers, aren't they?
    Are Helen`s parents programmers?
    Are Helen`s parents or friends programmers?
    Who are programmers?
    Whose parents are programmers?
2. There is a TV-set in this class, isn't there?
     Is there a TV-set in this class?
     Is there a TV-set or CD-player in this class?
     Where is there a TV-set?
     What is there in this class?
3. My friend has two uncles and four aunts, doesn't he?
    Does my friend have two uncles and four aunts?
    Does my or her friend have two uncles and four aunts?
    How many relatives does my friend have?
    Who has two uncles and four aunts?
4. My father visits a dentist twice a year, doesn't he?
    Does my father visit a dentist twice a year? 
    Does my father or mother visit a dentist twice a year? 
    How often does my father visit a dentist? 
    Who visits a dentist twice a year?
5. The students learn subjects on specialties, don't they?
     Do the students learn subjects on specialties?
     Do the students or pupils learn subjects on specialties?
     Who learns subjects on specialties?
    What do the students learn?