They have got a bike - ? +she has a big cake - ? +my sister has got a dog - ? +children have toys ? - надо сделать вопрос отрицание предложений

+ they have got a bike  

- they haven`t got a bike  

?  Have they got a bike ?

+She has a big cake  

-  She doesn`t have a big cake  

?  Does she have a big cake  ?

+My sister has got a dog

- My sister hasn`t got a dog

?  Has my sister got a dog?

+Children have toys

?  Do children have toys?

-  Children don`t have toys