The cages are really dirty. The zoo keeper _________ clean them.
has to
The windows aren't dirty. You _________clean them.
don´t have to
It's Monday tomorrow. I _________do my homework tonight.
have to
My brother is one year old. He _________ go to school.
doesn't have to
John and his sister are in the car. They ________ walk to school today.
don't have to
The bears are hungry. She _______ feed them.
has to
The hippos are good. I ________ look after them.
don't have to
The monkey isn't in its cage. We _________ tell the zoo keeper.
have to