17. You will find these buildings _____________________(设计建造) in different styles. (design)　

16. If I ______________________(懂得多一些的)first aid, I could have helped them.(know)　

15. A better understanding of environment is necessary, as__________________(愿意) to act. (willingness)　　

14. People _________________(都关心) the going up of rice prices and oil prices. (concern)

13. When would it ____________________________(你方便) to come? (convenient)　

12. Jack _________________________(深呼吸) and then dived into the water. (breath)　　　　

11. I’m very hungry. I ________________________(错过) lunch. (miss)

20. Your smoking can　　 　　　　　　　　(危害)the health of your children . (harmful)

19. The doctor told Jane that　　　　　　　　　 　　　　(她应该多锻炼身体).(exercise)

18. Haven’t I told you many times that　　 　　　　　　　　　　　　　　　　(你不应该吃没有成熟的水果吗)？(ripe)