His sister studies at school.
Нужно сделать
1 . общий
2.специальный
3 .к подлежащему
4.альтернативный
5.разделительный

His sister studies at school

1 Does his sister study at school?
2 Where does his sister study?
3 Who studies at school?
4 Does his sister study at school or at university?
5 His sister studies at school, doesn't she?