13. The tiger is 　　　　　　　　　　　　　(濒临绝迹). (danger)

12. The old temple made a 　　　　　　　(印象) me and I couldn’t tear myself away. (impression)

11. It’s cold outside. I ’m almost 　　　　　　　　　　　　(冻死). (freeze)

20. This morning Andrew, ______________ (其父是医生), told me about his party held last night. (be)

19. A rainbow appears after a rain, __________ (彩虹是一种自然现象). (phenomenon)

18. I can’t imagine __________ (我与那种女孩子结婚的情形) of that sort. (marry)

17. He failed the mid-term examination and only then ________________(我才意识到) how much time he had wasted. (realize)

16. Fortunately, the children in this district __________ (有机会使用) the latest textbooks now. (access) 教育博客

15. The boy is determined to work hard __________ (直到实现目标). (achieve)

14. In order to earn a good grade, I __________ (得不遗余力) to improve my English. (effort) 教育博客