Question

Fill in:mustn't, must ,might, don't have to,have to
1 If you're ill ,you .... go to the doctor immediately.
2 People ........ drop litter in the streets . It's illegal
3They .... come if they don't want to
4Anna .... come to the cinema with me tonight if she finishes work early.
5They ... be at work at 9:00am

Answer 1

1must
2mustn't
3don't have to
4might
5have to