16. I see no reason why they shouldn’t go on playing for another four or five years ______ they are fit enough. 

36.

15.At the end of the historic area, Wilmington displayed its _______ as a working port city: large ware-houses and a few other dated office buildings.

41. The best title of the passage can be ________

32.

9.Physicians need ________ expertise in pain and symptom management and skills in communication to meet the many needs of this population.

48. According to David Blankenhorn, people commonly believe that ________

22.

11. ________ on the cyberspace issue in a speech at a welcoming dinner in Seattle, Xi Jinping called on all countries to cooperate and draw up Internet policies corresponding with their national conditions.

35.

38.

55. Compared with the door hangers, the refrigerator magnet now excels at ________.