Complete the conversations, using the correct froms of have to or have got to​

Mr Small, Dr Foam ,Mrs Bulme  and their children saw an ald mam, who was 90.They asked his advice how to live a long life/ The old man advised them not tosmoke, not to drink,not to eat too much sugar or fat and  to drink lots of water. Then they saw another old man, who was 95. He said that he did exercise, and I didn't smoke or drink and he spent a lot of time in the open air and he was a vegetarian." 
Then they saw a very, very old man in the corner of the room, who had no teeth or hair and he couldn't see or hear very well. They asked them about his lifestyle.  He said that he smoked thirty cigarettes a day and drank a bottle of whisky every day. He said that sometimes   he also had two bottles of beer and he had never eaten vegetables or fruit and he lived on chocolate and cakes.
  The "old" man turned out to be 40

Receptionist является именем существительным,мужского рода,значит,он he.Тогда отбрасываем варианты have to, don`t have to.Получаем,что можно составить лишь такие модальные глаголы: 
A receptionist(администратор) doesn`t have to  и
A receptionist has to.
Теперь разберемся с обычными глаголами:
Take не подходит,ибо "администратор не может взять публику"
Work подходит только с послелогом with,потому что с публикой работать можно.
Deal with переводится как "иметь дело",а иметь дело с публикой можно,тем более,что здесь уже присутствует послелог.
Do -делать публику нельзя.
Use -использовать ее тоже нельзя. 
Поэтому,
A receptionist has to deal with the public.
A receptionist has to deal with the public.