词汇测验:

1. insidious

2. surrogate

3. ephemeral

4. attain

5. heterogeneous

6. antagonism

7. raucous

8. proclivity

9. constituent

10. antithesis

11. strenuous

12. submissive

13. irrevocable

14. alacrity

15. presumptuous

16. covet

17. profuse

18. tortuous

19. concise

20. rectitude

剩余时间： 200 秒