Section A

Directions: For each blank in the following passage there are four words or phrases marked A, B, C and D. Fill in each blank with the word or phrase that best fits the context.

 Two Newcastle scientists are setting themselves to open our eyes to the medical truth by claiming that natural sunlight may help prevent skin cancer.
Dr. Ron Laura, professor of health education at Newcastle University, and senior chemist Mr. John Ashton said their research points to a complete __51______ of the accepted scientific theory. They said that sunscreen creams may help cause skin cancer, the artificial indoor light could be __52_____ and that a range of drugs in common use could also ___53____ melanoma--a type of cancer that appears as a dark spot on the skin.
The research is likely to be unwelcome in some traditional medical research circles. It is based on a new __54_____ that our bodies are protected from skin cancer by the regulation of a group of complex vitamins (Vitamin D) and immune process.
The sunscreens, artificial light and drugs could all unfavorably affect the production of these vitamins and increase the skin’s __55_____ to the sun. But Dr. Laura said natural sunlight passing through the eyes helped __56_____ the production of cancer protection Vitamin D.
  He said recent statistics from the United States indicated that people who worked indoors all day in artificial light were more __57_____ melanomas than those who worked outdoors. Indoor workers should try to have at least one hour of __58_____ to direct sunlight every day, ___59_____ in the early morning and late afternoon when ultraviolet intensively was lower, Dr. Laura said.
Sunscreens, long __60_____ as essential for beach lovers, could also __61______ the production of Vitamin D. Laura and Ashton said sunscreens give people a __62_____ sense of security in thinking they are __63______ from the sun’s rays.
Dr. Laura said more statistics ___64_____ their claim had come to light since the first article was published. He believes his research findings are too important to be __65______ to the scientific world . 

51. A. contribution B. reversal C. combination D. recognition

52. A. beneficial B. comfortable C. harmful D. favorable

53. A. promote B. reduce C. remove D. eliminate

54. A. assumption B. law C. concept D. theory

55. A. sensitivity B. resistance C. adaptation D. response

56. A. monitor B. measure C. slow D. stimulate

57. A. subject to B. unrelated to C. free of D. dependent on

58. A. exercise B. reveal C. exposure D. experience

59. A. occasionally B. preferably C. enjoyably D. extremely

60. A. received B. popular C. accepted D. identified

61. A .balance B. adjust C. prevent D. enhance

62. A. false B. strong C. true D. sharp

63. A. separated B. protected C. guarded D. prohibited

64. A. presenting B. doubting C. backing D. providing

65. A. limited B. emphasized C. acknowledged    D. explained

真相大白

51-55 BCADA 

56-60 DACBC 

61-65 CABCA

步步为赢：

51. B。本题结合后句，说涂防晒霜会导致皮肤癌。而之前我们涂霜是为了防止被晒伤，但现在证明阳光会防止皮肤癌，因此这项研究结果是颠覆我们以往的理论知识。

52. C。本题不难，这几句都是再说使用一些东西会带来不好影响。 

53. A。本题和上题一样，都是在讲容易致癌的东西。melanoma虽然不认识，但是根据后句的解释看得出选A，是促进这种恶性循环。

54. D。两位科学家的说法一般都是基于一种新的理论研究，并配有实验观察结果。

55. A。本题是说前面三个主语会大大影响维他命D的产生，使得皮肤难以抵御风吹日晒，就变得对阳光非常敏感。

56. D。本题不难，说的是自然光线能有效促进维他命D的生成。

57. A。本题需要学生知道subject to表示“受制于”的意思，说在室内工作受人工光线照射的人更容易得黑素瘤。

58. C。本题不难。室内工作者要花点时间暴露在阳光下比较好。

59. B。本题的preferably指的是“更好的”意思。说最好是在清晨和傍晚与外界接触，因为这时紫外线强度低。

60. C。本题结合后句，说沙滩爱好者认为抹防晒霜很重要，看得出他们是主动接纳防晒霜。

61. C。本题不难。呼应前文便可知道是prevent。

62. A。本题不难。防晒霜带给人们的安全感自然是错误的。

63. B。本题不难。人们一直都误以为涂防晒霜可以保护皮肤不受太阳光侵害。

64. C。本题看到Laura对自己的研究成果很自信，对他而言，许多数据自然是支持他的观点。

65. A。本题可用排除法来做。只有A选项“太重要了，不会被限制在科学界”较符合文意。

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