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  3. Alzheimer’ s Disease Alzheimer’s disease (阿尔茨海默症，又叫老年痴呆症) affects millions of people around the world. American researchers s

Alzheimer’ s Disease Alzheimer’s disease (阿尔茨海默症，又叫老年痴呆症) affects millions of people around the world. American researchers s

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问题                         Alzheimer’ s Disease
   Alzheimer’s disease (阿尔茨海默症，又叫老年痴呆症) affects millions of people around the world. American researchers say the disease will affect more than one hundred million people worldwide by the year twenty fifty. 【B1】______
   Researchers and doctors have been studying Alzheimer’ s patients for a century. Yet the cause and cure for the mental sickness are still unknown. However, some researchers have made important steps towards understanding it.
  【B2】______At first, patients have trouble remembering little things. Later, they have trouble remembering more important things, such as the names of their children.
   There are also some physical tests that might show who is at risk of developing Alzheimer’ s disease. The tests look for proteins (蛋白质) in brain and spinal cord. The proteins appear to be found only in people with the disease. 【B3】______
   Now, a much simpler physical test to predict Alzheimer’ s risk has been developed. Researchers found that trouble with the sense of smell can be one of the first signs of Alzheimer’ s.【B4】______These smells included cinnamon(肉桂) , black pepper(黑胡椒) , chocolate, paint thinner (涂料稀释剂) , and smoke.
   The study continued for five years. During this period, the same people were asked to take several tests measuring their memory and thought abilities. Fifty percent of those who could not identify at least four of the smells in the first test had trouble with their memory and thinking in the next five years.
   Another study has shown a possible way to reduce a person ’ s chances of developing Alzheimer’ s disease in old age.【B5】______Those who read a newspaper, or play chess or word games are about three times less likely to develop the condition. Researchers say they still do not know what causes Alzheimer’ s disease. But they say these findings might help prevent the disease in the future.
   A. That would be four times the current number.
   B. The protein tests can correctly identify the presence of the disease in about ninety percent of patients.
   C. It’ s important to recognize the symptoms of Alzheimer’ s disease.
   D. Researchers in Chicago found that people who use their brains more often are less likely to develop Alzheimer’s disease.
   E. Several early signs of the disease involve memory and thought processes.
   F. Using this information, they developed a test in which people were asked to identify twelve familiar smells.
【B4】
选项
答案F
解析 空格位于段落中间，考生可以根据空格前后的内容来判断应填句子。空格前讲到了预测患阿尔茨海默病风险更简单的方法一研究人员发现患有阿尔茨海默病的人在早期会有一些嗅觉方面的问题。而空格后的句子介绍了几种气味，因此空格处的内容应该与smell这一信息相关。通过分析选项，不难发现，只有选项F中出现了smells一词，而且“利用这一信息，他们开发了一项让人们辨识12种相似气味的测试”在内容上也符合上下文语境，因此符合题意。
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