Your answer
has to be correct.
You have to
make a reservation earlier.
You have to
go now.
I have to
work late tomorrow.
She has to
go to the shop to buy some bread.
You must
clean your hands before eating.
You must
listen to your mother.
You must
put on a hat in winter.
You must
visit a doctor tomorrow.
You must switch
off the radio before leaving the house.