练习题

In recent years, researches have suggested more health value from vitamin D than had once been thought.

Vitamin D is (62) naturally in the is a (63) source. It is also found in some foods. Vitamin D helps to increase levels of calcium in the blood. It helps build strong bones and teeth.

It also (64) to do more than just protect against rickets (软骨病). That serious bone disease was the reason why vitamin D was added to milk. Rickets is now (65) in the western world. But it is still a common childhood disease in developing countries. Rickets can and is also (66) to cause bone pain and weakness, teeth problems and muscle (67)

According to the study by the Harvard School of Public Health, Vitamin D might protect against multiple sclerosis (硬化症), also called MS.

MS is a (68) disease of the central nervous system that (69) about two million people around the world. There is no (70) . The level of severity can differ from person to person. But is usually seriously disabling.

The study iii Boston found that people with higher levels of vitamin D had lower (71) of MS. It found that the chance of developing MS was sixty-two percent lower among those with the highest level of vitamin D (72) those with the lowest level.

Vitamin D may become a future (73) for MS. But, he says first scientists must carry (74) a large, controlled study in which some people get vitamin D and others (75) not.

This is not the first study to show a possible (76) between vitamin D and multiple sclerosis. But it has (77) the clearest evidence of a direct (78) . The National Institutes of Health says some studies also suggest vitamin D (79) protect against some kinds of (80) . But it says more human studies are needed to learn if a lack of vitamin D (81) the risk of cancer.

62. A) made B) produced
C) created D) manufactured

63. A) major B) minor
C) most D) surplus

64. A) shows B) appears
C) looks D) appeals

65. A) common B) popular
C) rare D) usual

66. A) added B) subjected
C) owned D) reducted

67. A) loss B) lack
C) insufficiency D) shortage

68. A) slow B) gradual
C) progressive D) tardy

69. A) effects B) affects
C) impacts D) suffers

70. A) cure B) solution
C) curl D) curse

71. A) levels B) rates
C) rites D) interests

72. A) than B) then
C) and D) as

73. A) danger B) way
C) method D) treatment

74. A) in B) out
C) about D) on

75. A) do B) get
C) make D) gain

76. A) difference B) relative
C) relationship D) combination

77. A) refused B) provided
C) promoted D) denied

78. A) combination B) touch
C) contact D) link

79. A) may B) should
C) can D) must

80. A) cancer B) fever
C) cold D) flu

81. A) rises B) decreases
C) increases D) improves

答案
62.答案:B
[精解] 动词辨析题。本句意在表达“维他命D是在血液中自然产生的。”四个选项为同义词，故需要找出适合此语境的最佳答案。produce意为“产生，生产”，可用来描述人体中各成份的合成产生。故B)为本题答案。

63.答案:A
[精解] 形容词辨义题。前句说明维他命D在血液中自然形成，所以该句表达的应该是太阳光是维他命D产生的主要来源。A)为本题答案。

64.答案:B
[精解] 动词辨义题。appear to do与seem to do意思相近，意为“似乎做了某事”。该句表示维他命D似乎不仅仅能预防软骨病。故B)为本题答案。

65.答案:C
[精解] 形容词辨义题。该空的信息点在后文“but it is still a common childhood disease in developing countries。”所以可推断该句应该与后句形成对比，即“软骨病目前在西方发达国家已不多见。”故选C)。

66.答案:A
[精解] 动词辨义题。该句意在说明软骨病还会引起骨痛，虚弱和牙齿问题。与前文构成递进关系。故选择A)。

67.答案:A
[精解] 名词辨义题。此处是一个名词的并列。前文提到骨痛，虚弱和牙齿问题，所以可以推断此处所指的应该也是一种疾病。muscle loss意为肌肉损伤。故本题答案为A)。

68.答案:C
[精解] 形容词辨义题。此处想要表达“硬化症是一种中枢神经的慢性病”。选项中的四个词都可表示“慢”的意思。但是progressive“渐进的”可用来表示疾病，更准确。故本题答案为C)。

69.答案:B
[精解] 动词辨义题。该句意在表达硬化症作为一种慢性病，影响着全球两百万余人的健康。故选择B)
affects。

70.答案:A
[精解] 名词辨义题。此处很明显意在表达硬化症是无法治愈的。cure意为“治愈”，故本题答案为A)。

71.答案:B
[精解] 名词辨义题。答题点在第四段提到的“Vitamin D might protect against multiple sclerosis，also called MS．”故此句表达的应该是“维他命D含量高的人们得硬化症的机率会较低。”故选择B)rates“几率”。

72.答案:A
[精解] 连词辨义题。本句实际上是一个对比结构。从本句第一个“lower”可以判断。该句意在表达“维他命含量最高的人群与含量最低的人群相比，患硬化症的可能性会降低62%。”故选择比较连词A)than。

73.答案:D
[精解] 名词辨义题。前文提到维他命D能很好的预防硬化症，故此处意在表示“维他命D今后很有可能成为治疗硬化症的方法。”故选择D)treatment“疗法”。

74.
答案:B
[精解] 固定搭配题。此处意在表明“科学家们首先要进行一系列的试验。”carry out固定搭配意为“实行，进行”，故本题答案为B)。

75.答案:A
[精解] 动词辨义题。此处考查省略结构。该空前提到“some people get vitamin D”，意在说明在即将进行的试验中会有一部分人服用维他命D，一部分人不服用，以对比效果。故此处应选择do not来代替“some people do not get vitamin D”。故选择A)。

76.答案:C
[精解] 名词辨义题。前文提到很多关于维他命D能够预防硬化症，甚至有可能成为治疗方法的发现。但此处话锋稍转意在表明目前对维他命D与硬化症之间的关系还未有定论。故选择C)。

77.答案:B
[精解] 动词辨义题。本句意在说明诸多研究都为维他命D与硬化症之间的联系提供了证明。故本题答案为B)。

78.答案:D
[精解] 名词辨义题。此处需要一个表示维他命D与硬化症之间“关联”的词。link意为“环节，联系”，故本题答案为D)。

79.答案:A
[精解] 情态动词辨义题。该空的答题点在于后文“but it says more human studies are needed．．．”，故对于维他命D能否抵抗癌症，作者的态度不该是完全肯定的。因此应选择A)may“可能”。

80.答案:A
[精解] 名词辨义题。文章最后一句是本空的提示点：对于缺乏维他命D是否会提高癌症的发病率，还需更进一步研究证明。所以本句描述的应该是维他命D与癌症之间的关系。故选择A)cancer。

81.答案:C
[精解] 动词辨义题。前句提出目前研究发现维他命D也许能够抵抗癌症。本句意在讲述“缺乏维生素D与癌症发病率的关系”，所以从上句的科学研究发现可知维生素D的缺乏有可能提高，而不是降低癌症发病率，故本题答案为C)。