1. 投资 V2. 遗迹,遗体 N3. 存在 N 4. 进化;演变 N5. 暴露,显露 N 6. 促成,做贡献 V 7. 代表 N8. 投标,努力,争取 N 9. 歧视 N 10. 许诺做某事;同意做某事 V 11. 每年的 adj.12. 极端的 adj.13. 使 陷入困境 V14. 商业的 adj.15. 促进,增进;促销,宣传;晋升 V16. 艰难的,艰巨的 adj.17. 轻便的,便携的 adj.18. 不正常的,反常的 adj.19. 阻止;打消 V20. 紧急情况;突发事件 n21. 可靠性 N22. 至关重要23. 使某人想起24. 作为回报25. 经历(困难,痛苦等);仔细检查;顺利完成26. 进入,到达27. 冒险28. 如果万一1. preserve2. prehistoric3. list4. awareness5. fund6. catastrophe7. estimate8. marvelous9. monument10. compromise11. subjective12. thorough13. guidance14. diplomacy15. rainfall16. nuclear17. radioactive18. magnetic19. isolated20. ecology21. obscure22. fragile1. “Do you have some letters ____?” the secretary asked her manager.A to type B typedC type D to be typed2. He ____ football regularly for many years when he was young.A was playing B playedC has played D had played