4 | Look at the pictures and complete the sentences using the passive voice with modal verbs.

0. The car must be cleaned. | 1. The room ★★★ | 2. The trees ★★★

3. The suitcase ★★★ | 4. The puppy ★★★ | 5. The beach ★★★

5 | Listen and match the speakers to the comments. One comment is extra. |

| a) More public transport should be used to reduce pollution. b) Water bottles can be left outside in the sun. c) They should be replaced with reusable ones. d) Trees mustn't be cut down in this area. e) Solar panels can be installed there.

6 | Work with a partner and make a poster about what should/can/must/shouldn’t/ mustn’t be done to protect our planet. |