Complete the comments in 'My chat room'.

1. Can I use your 'dictionary' and your 'calculator'? 2. We need blue and red 'paints' this Monday. And wear 'trainers' for P.E.! 3. And we have new 'screens' in the computer room! 4. The bookshop has new 'optional' 'courses'. Pens, 'pencils', a ruler, 'scissors'.