Exercise 6. Fill in the blanks with correct words in the box. pollution wonder mountain cave island diverse quiet flower decorate go 1. Son Doong Cave, a ____________ belongs to the Phong Nha-Ke Bang grotto system in central Quang Binh Province, has been discovered to be the biggest in the world. 2. The chemicals have been identified as a source of ____________. 3. In the summer, I usually ____________ to the park with my friends. 4. Phu Quoc ____________ boasts idyllic beaches, romantic sunsets, evergreen forests, and a serene atmosphere, making it an ideal holiday destination for travellers looking to escape bustling city life. 5. Fansipan is a ____________ in Viet Nam. 6. The plant has a beautiful bright red ____________. 7. The family gets together on Christmas Eve to ____________ the tree. 8. I often ____________ what became of him. 9. People from ____________ cultures were invited to the event. 10. We’ll have to be ____________ so as not to wake the baby..