第6部分：完形填空（第51～55题，每题1分，共15分）

　　下面的短文有15处空白，请根据短文内容为每处空白确定一个最佳选项。

Study Confirms Red Meat Link with Bowed （结肠） Cancer

　　People who eat more than 160 grams of red or processed meat a day are 35 percent more likely to develop bowel cancer than those who ear less ________（51） 20 grams a day, according to one of the biggest nutrition investigations ever carried out.

　　The European Prospective Investigation into Cancer and Nutrition followed 478,040 men and women ________（52）35 to 70 from 10 European countries.

　　All subjects were free of cancer at enrollment between 1992 and 1998, but ________（53） an average follow-up of almost 5 years 1,329 bowel cancers had been reported.

　　The subsequent analysis, published in the Journal of the National Cancer Institute, confirms the long-held suspicion ________（54） high intakes（纳入量） of red meat are associated with increased bowel ________（55） risk.

　　After taking into consideration factors like age, sex, height, weight, energy intake physical activity, smoking, and alcohol consumption, the investigators found that bowel cancer was ________（56） with intake of red and processed meat but not chicken.

　　Risk of bowel cancer dropped with increasing intake of fish. Eating more than 80 grams a day of fish was associated ________（57） a 31 percent reduction in risk compared with eating less than 10 grams a ________（58）

　　Subjects with high red meat and low fish intake were at 63 percent higher' risk of bowel cancer compared with subjects with low red meat and high fish ________（59）. In addition, the risk of developing the disease was increased for ________（60） people who ate a low fibre diet.

　　Sheila Bingham, study investigator at the UK's Medical Research Council nutrition unit, said: "People have suspected for some time that high levels of red and processed meat ________ （61） risk of bowel cancer, but this is one of the largest studies worldwide and the first from Europe of this type to show a ________（62） relationship."

　　She added in a statement: the overall picture is very consistent for red and processed meat and fibre across all the________ （63） populations studied."

　　Study coordinator, Elio Riboli, of the World Health Organisation International Agency for Research into Cancer, said: "Other risk factors for ________ （64） cancer include obesity （肥胖） and lack of physical activity. Smoking and excess alcohol may also play a ________ （65）. These factors were all taken into account in the analysis

　　51 A from B than C between D among

　　52 A aging B years C aged D ranging

　　53 A before B after C since D when

　　54 A that B which C whether D why

　　55 A illness B cancer C problem D death

　　56 A presented B selected C contrasted D associated

　　57 A with B into C for D against

　　58 A month B year C day D week

　　59 A habit B experience C harvest D intake

　　60 A these B much C those D that

　　61 A increase B lower C meet D show

　　62 A strong B poor C weak D casual

　　63 A Asian B American C European D African

　　64 A new B organ C fatal D bowel

　　65 A factor B role C risk D chance

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