Part I: Choose the option that best fits each of the numbered blanks from 1 to 5.

JOIN OUR "GREEN NEIGHBORHOOD" CAMPAIGN
Our city is changing rapidly, and we need to act now to keep it livable. One of the most ___(1)___ ways to help is by reducing our carbon footprint. Instead of driving, why not try cycling? It is not only good for your health but also helps reduce___(2)___ in the city center. ___(3)___ using private cars, more people are switching to electric buses. When you are at home, remember to switch off all ___(4)___ when you leave the room. Small actions can make a big difference. By ___(5)___ these green habits, we can create a sustainable future for everyone.