Complete the sentenses. Use words and phrases you have learnt in this unit

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!
1. Improved road conditions may help reduce in the city. 
2. My city was ranked as the most  city in the country thanks to its excellent facilities and clean air.
3. Cities in the future will have a lower carbon footprint and will be more .
4. Smart technologies have made lives of  more convenient.