VOCABULARY AND GRAMMAR: 6. Cuc Phuong National park was ……………opened in 1960. a. officially b. completely c. nearly d. usually 7. Most of them got carsick because they went …………..coach. a. on b. in c. by d. with 8. A group / groups of animals or plants are called ………….. a. species b. chemicals c. population d. forest 9. ………………is related to an area near a tropical area. a. temperate zone b. sub-tropical c. rainforest c. mountain 10. A state of being polluted is …………….