题目内容
The first paragraph mentions three ways of activating the saliva in the mouth.
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26-28Questions 26 to 28 are based on the passage you have just heard.
第26题：
A. reap B. harvest C. benefit D. lead
第六部分：完型填空 (每题1分，共15分) 阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案，并涂在答题卡相应的位置上。
Diet，Alcohol Linked to Nearly One Third of Cancers
Diet is second only to’tobacco as a leading __51__ of cancer and，along with alcohol，is responsible for nearly one third of cases of the disease __52__developed countries，a leading researcher said on Tuesday.
Dr.Tim Kev，of the University of Oxford，told a cancer conference that scientists are still discovering how certain foods contribute to __53__，but they know that diet，alcohol and obesity __54__ a major role.
“Five percent of cancers could be avoided __55__ nobody was obese，”he said.
While tobacco is linked to about 30 __56__ of cancer cases，diet is involved in all estimated 25 percent and alcohol __57__ about six percent.
Obesity raises the __58__of breast，womb，bowel and kidney cancer，while alcohol is known to cause cancers of the mouth，throat and liver.Its dangerous impact is __59__ when combined with smoking.
Key told the meeting of the charity Cancer Research UK __60__other elements of diet linked to cancer are __61__ unknown but scientists are hoping that the EPIC study，which is comparing the diets of 500，000 people in 1 0 countries and their risk of cancer，will provide some __62__.
Early results of the study have revealed that Norway，Sweden and Denmark have the consumption of fruit and vegetables among European countries while Italy and Spain have the highest.Eating at __63__five portions of fruit and vegetables a day is recommended to reduce the risk of cancer.
Key，principal scientist on the EPIC study，said it is looking at dietary links to some of the most common cancers __ 64 __colorectal，breast and prostate.
词汇：
obesity n.肥胖
breast n.乳腺
bowel n.肠
dietary adi.饮食的
prostate/ adi.前列腺的
第51题：
“An independent technician” in the first sentence of the second paragraph means__.
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