Complete the sentences with phrases from 1

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!
   am thinking of      looks beautiful      seems a good solution   
1. It to many environmental problems.
2. The modern infrastructure of the city .
3. I living in a smart city in the future.