58. likely/sure/certain　

57. embarrassment/situation/difficulty

56. communicate/interact/talk/chat

55. allowing　

54. benefit/value/importance

53. positive/active　

Ⅳ.51. Tips/Suggestions

52. however　

50. C　 主旨大意题。根据文章第一段最后以及第三、四、五段尤其是第五段的首句The best way to get rid of a negative serf-image is to realize that your image is far from…可知，文章是关于“如何建立积极地自我形象”的。

49. D　 细节理解题。根据文章第二段最后一句Thus changing the way you think about yourself is the key to changing your self-image and your whole world.可知，改变自我形象的关键是改变对自己的看法。

48. C　 细节理解题。根据文章第一段最后一句If you find that believing in yourself is a challenge, it is time you build a positive self-image and learn to love yourself.可知答案。