Fill in the gaps with must or have to and complete the sentences. sometimes both variants are correct

1.I...get up earlier today.I want to finish a very interesting book.
2.He ... read this book for his histori lesson.After that, he'll ... write an essay on it.
3.They ... be here for a month.Their granny needs their help
4.I'm sorry I ... go.I ... help Mum cook dinner.
5.I don't like potatoes but sometimes I ... to eat them
6.You ... watch this film.It's very fanny.
7.You'll ... go to the shop with me.I need your help.
8.It's very late, but I ... finish my homework before I go to bet.