14. We should 　　　　　　　　　　　　　　　　　　　　　(忠于)our country. (loyal)

13. I don’t think you　　　　　　　　　　　　　　　　　　　　　 (有困难)passing this exam. (difficulty)

12. The train left three minutes ago. You　　　　　　　　　　　　　　　　　　　　　 (应早一点来). (come)

11. The bridge　　　　　　　　　　　 (要修建的)next spring will join that island to their city. (build)

20. John regretted very much _______________________(没听) Mr. Smith’s lecture last week. ( attend )

19.You _________________________________(对…负责) what you have done some day. ( answer )

18. No one likes ______________________________________________(嘲笑) in public. ( laugh )

17. Tom, you are late again. This time I _______________________(不打算) listen to any of your excuses. ( prepare )

16. It’s high time we ____________________________(采取措施) to prevent pollution. ( measure )

15. One way to understand thousands of new wards is to gain _________________________ (好好掌握) basic word formation. (knowledge)