ĐIỀN HAVE TO HOẶC MUST 
1.    The bus goes at 10.15. She …… …………….. leave at 10 if she wants to catch it.
2.    The British Library: Coats and bags … …….. be left at the coakroom or in a locker.
3.    Jim can’t see very well. He …… …………….. wear glasses.
4.    You …. ….. see the film. It’s fantastic.
5.    Johny, you …… …….. be nice to your mum.
6.    Oh, no. It’s Monday tomorrow. I … - ….. go to school again.
7.    English children …… …….. stay at school till they are 16.
8.    OK. You can go to the party, but you …   ….. be back before midnight.
9.    A flight attendant: “All mobile phones …… …….. be switched off during the take off.”
10.    The metro station is closed. I …… …….. get a taxi.