Complete the sentences. Use the words and phrases in the box.

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
   appliances      carbon footprint      eco-friendly      green lifestyle   
1. More people adopt a .
2. You should cut down on electricity usage to reduce your .
3. Many modern houses today are built from materials.
4. Modern household make housework much easier.