Complete the sentences with the correct form of the verbs in Exercise 4. Then listen and check.

Exercise 5: Completing sentences

1. Don't forget to switch off the lights before you go to bed.
2. Can you turn down the heating? It's really warm.
3. You shouldn't waste the TV consume at night.
4. Did you know your computer consumes a lot of electricity?
5. It's better to have a shower than a bath because you don't consume so much water.
6. You should try to reduce the number of hours you use the air conditioning.
7. We're trying to save energy so I always switch off my computer when I'm not using it.