• listen to the radio commercials of Unit 13 (page 72) and prepare answers to questions in the exercise

• read article of Unit 28 (Economics and ecology) on pages 136-137 and do vocabulary exercise 1 on page 137 and ex.2 on page 138

• check your Units 9+10 review test  with the key below

• revise grammar of modal verbs, print out and do the modal verbs exercise below

• print out graphs 1, have a look at the vocabulary of graph description and do the exercises