It isn't necessary for her to give me money back.

-> She ______ give me money back.

It was possible to buy cinema tickets online last year.

-> You ______ buy cinema tickets online last year.

It's the rule to wear a mask in public places.

-> You _____ wear a mask in public places.

We aren't able to visit you today, granny.

-> We ______ visit you today, granny.

It's forbidden to feed the birds in the zoo.

-> You _____ feed the birds in the zoo.

Is it OK if I borrow your yellow pencil?

-> ______ I borrow your yellow pencil?

He isn't allowed to go to school alone.

-> He ______ go to school alone.

It's necessary to eat a lot of vegetables.

->You ______ eat a lot of vegetables.

She isn't able to sing well.

-> She ______ sing well. 

It isn't necessary to make a chocolate cake for her birthday party.

-> They ______ make a chocolate cake for her birthday party. 

Here there are fifty films children are very recommended to watch before they're twelve.

-> ...children ______ watch before they're twelve.

Rabbits are able to jump around 3 meters in length.

-> Rabbits ______ jump around 3 meters in length. 

It's necessary for him to finish it today or he'll be fired.

-> He ______ finish it today or he'll be fired.

I have a dentist appointment at 5 p.m. Is it OK if I leave early today, ma'am?

-> ______ I leave early today, ma'am?

Of course, Hagrid! It's necessary for me to ask you more about the magic world. 

-> I ______ ask you more about the magic world.