Question

Must. mustn't. don't have to
I've told you befoe - you ______ play football in the street.
You____ forget to lock the door before you leave.
If you go to London. you _____ go to the Trocadero - it's great!
My old dictionary is useless - I ____ buy a new one

Answer 1

1) Mustn't
2) Mustn't
3) Must
4) Must