Read these sentences and choose the modal verb 'must' or 'mustn’t'. 1. You must mustn't annoy your little brother. 2. You must mustn’t do your homework very quickly. 3. They mustn’t must do more exercises to stay fit.

Задание

Read these sentences and choose the modal verb 'must' or 'mustn’t'.

You [must|mustn't ] annoy your little brother.
You [must |mustn’t] do your homework very quickly.
They [mustn’t|must ] do more exercises to stay fit.