Ответ:

  1. Have her parents got five sons?
  2. Has the dog got a puppy?
  3. Has Sue got friends?
  4. Have your sisters got toy elephants?
  5. Has the bird got corn?
  6. Has Ben got a new schoolbag?
  7. Has the table got four legs?
  8. Have the boys got bicycles?
  9. Have our friends got a new CD?
  10. Who has got a red shirt?
  11. How many sisters have you got?

Правило: has употребляется с существительными и местоимениями в единственном числе, have — во множественном числе и с you.