II. Complete the following sentences with the correct form of the words in brackets. 1. Fossil fuels are very common in our ___________ but they pollute the environment. (social) 2. We will use more ________ energy in the future. (sun) 3. The Rio Carnival is the biggest and most famous with the most lively ___________. (celebrate) 4. The streets looked very ___________ _ with colorful lanterns and lion dancing performances. (festival) 5. There are many __________ differences between the two communities. (culture) 6. It is _____________ in America to eat turkey on Thanksgiving Day. (tradition) 7. My daughter’s eyes were wide with _____________ when she heard the news. (excited) 8. In the future, the wind and the sun will be used as the most important ________________ friendly energy sources. (environment) 9. The Sedway is a success, but it’s not as popular as the ___________ hoped. (invent) 10. ____________, I think a hover scooter is too hard to park. (Person)