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  3. Eating Potatoes Gives Your Immune System a Boost Eating potatoes is not only good for bowel health, but also for the whole i

Eating Potatoes Gives Your Immune System a Boost Eating potatoes is not only good for bowel health, but also for the whole i

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问题                 Eating Potatoes Gives Your Immune System a Boost
    Eating potatoes is not only good for bowel health, but also for the whole immune system, especially when they come in the form of a potato salad or eaten cold. In a study on an animal model, researchers in Spain found that pigs fed large【C1】______of raw potato starch(RPS)not only had a healthier bowel, but also decreased levels of white blood cells,【C2】______as leucocytes and lymphocytes in their blood. White blood cells are produced as a【C3】______of inflammation or disease, generally when the body is challenged.
    The general down-regulation of leucocytes observed by the Spanish researchers suggests an overall beneficial effect, a generally more【C4】______body. The reduction in leucocyte levels was about 15 percent. Lower lymphocyte levels are also indicative of【C5】______levels of inflammation , but the observed reduction in both lymphocyte density【C6】______lymphocyte apoptosis is surprising.
    In 【C7】______was the longest study of its kind, pigs were fed RPS over 14 weeks to 【C8】______the effect of starch on bowel health. "The use of raw potato starch in this experiment is【C9】______to simulate the effects of a diet high in resistant starch," said study leader Jose Francisco Perez at the Universitat Autonoma de Barcelona, Spain.
    Humans do not eat【C10】______potatoes, but they do eat a lot of foods that contain resistant starch, such as cold boiled potatoes,legumes,grains,green bananas,pasta and cereals. About 10 percent of the starch eaten by human is resistant starch—starch that is not【C11】______in the small intestine and so is shunted into the large intestine where it ferments. Starch consumption is thought to reduce the【C12】______of large bowel cancer and may also have an effect on irritable bowel syndrome(IBS).
    Immunology expert Lena Ohman’ s team【C13】______found that the overall lymphocyte levels do not vary for IBS patients,but that lymphocytes are transferred from the peripheral blood to the gut,which support the hypothesis of IBS being【C14】______least partially an inflammatory disorder. She says the decrease in lymphocytes observed by the Spanish is therefore interesting, and a diet of resistant starch may be worth【C15】______in IBS patients. Ohman is currently at the Department of Internal Medicine, Goteborg University, Sweden. The study is published in the Journal Chemistry and Industry, the magazine of the SCI.
【C15】
选项 A、try
B、to try
C、tried
D、trying
答案D
解析 be worth doing sth．意为“值得做某事”，注意worth后面的动词必须使用一ing形式。故选C。
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