Unit7 Whats the highest mountain in the world? (重点短语)1. The population of 的人口2. one of the oldest countries 最古老的国家之一3. feel free to do sth. 随意地做某事4. as far as I know 据我所知 来源:学优高考网as you can see 正如你所看到5. in the face of difficulties / challenges 面对困难 / 挑战来源:gkstk.Com6. run over with excitement / happiness 兴奋/ 开心 的跑过去7. succeed (in) doing sth 成功做某事8. live up to 80 to 90 years 活到80至90岁9. any other mountain 其他任何一座山10. prepare for 为某事做准备 prepare to do sth 准备做某事11. run along = lie in 跨越 12. freezing weather 冰冻的天气13. take in air 呼吸空气14. the first people to do sth. 第一个做某事的人15. die of 死于（自然原因） die from 死于（意外原因）来源:gkstk.Com来源:gkstk.Com16. spend (in) doing sth 花做某事17. achieve one s dream = dreams come true 实现某人的梦想18. the forces of nature 自然界的力量19. reach the top 到达顶峰20.There be + sb / sth doing sth + swh. 某地有某人/ 某物正在做某事21. at birth 在出生的时候 give birth to sb 给某人以生命22. 200 pandas or so = about / around 200 pandas 大约200只熊猫来源:学优高考网23. walk into sb. 撞到某人24. endangered animals 濒危动物25. be in danger 处于危险之中 26. the importance of 的重要27. 8,844 meters deep 8844米深 6,671 kilometers wide 6671千米宽28. 9,600,000 square kilometers in size 9,600,000平方千米