Modals for Obligation

 First lets do the exercises in the following links:

1. Modal Exercise 4
2. Modal Exercise 3
3. don't have to, doesn't have to - Exercise
4. http://www.autoenglish.org/modalverbs/gr.mustnt.i.htm
5. http://www.autoenglish.org/modalverbs/ModalsObligation.htm
6. http://learnenglish.britishcouncil.org/es/grammar-exercises/modals-1
7. http://www.englishclub.com/grammar/verbs-modals-have-to-must-not-quiz.htm

Write a sentence in English about each of the following signs to explain the safety regulations in a factory

Now write 5 sentences about safety in a restaurant kitchen.