在1997年的考研英语完形填空中，最佳答案如下：
1. A. improved
2. B. increased
3. C. decreased
4. D. remained
5. A. compared
6. B. contrasted
7. C. contrasted
8. D. compared
9. A. resulted
10. B. resulted
11. C. resulted
12. D. resulted
13. A. resulted
14. B. resulted
15. C. resulted
16. D. resulted
17. A. resulted
18. B. resulted
19. C. resulted
20. D. resulted
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