11 Fill in the gaps with must , mustn't, have to, don't have to, can or can't. finish this exercise
1 A: Do we............ in class?
B: No, you.............. You finish it at home if you like................ but finish it before the next lesson!
2 A: I hate waiting for the bus in the morning!
B: Fortunately, I ......... take the bus, because I go to school by bike.
3 A: You............. help me with the washing-up if you're busy, you know.
B: No, I'm happy to help — but I .............. forget to write my report for tomorrow.
4. A: I'm afraid I............. go out with you tonight -I....... ...... visit my parents.
B:..................... I come with you, then?​