Complete the sentences with your own words.
1. Children don't have to ...
2. Children mustn't ...
3. Waiters don't have to ...
4. Waiters mustn's ...
5. Nurses don't have to ...
6. Nurses mustn't ...

1. Children don't have to interrupt grown-ups.2. Children mustn't be noisy.3. Waiters don't have to pay for food in a cafe4. Waiters mustn't be rude to clients..5. Nurses don't have to be well-educated6. Nurses mustn't be late for work.