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。

　　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_________ (1) 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_________ (2)35 to 70 from 10 European countries.

　　All subjects were free of cancer at enrollment between 1992 and 1998, but_________ (3) 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_________ (4) high intakes(纳入量) of red meat are associated with increased bowel_________ (5) 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_________ (6) 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_________ (7) a 31 percent reduction in risk compared with eating less than 10 grams a_________ (8)

　　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_________ (9). In addition, the risk of developing the disease was increased for _________ (10) 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_________ (11) risk of bowel cancer, but this is one of the largest studies worldwide and the first from Europe of this type to show a_________ (12) relationship.

　　"She added in a statement: 'q-he overall picture is very consistent for red and processed meat and fibre across all the_________ (13) populations studied."

　　Study coordinator, Elio Riboli, of the World Health Organisation International Agency for Research into Cancer, said: "Other risk factors for _________ (14) cancer include obesity (肥胖) and lack of physical activity. Smoking and excess alcohol may also play a _________ (15). These factors were all taken into account in the analysis

　　1 A from B than C between D among

　　2 A aging B years C aged D ranging

　　3 A before B after C since D when

　　4 A that B which C whether D why

　　5 A illness B cancer C problem D death

　　6 A presented B selected C contrasted D associated

　　7 A with B into C for D against

　　8 A month B year C day D week

　　9 A habit B experience C harvest D intake

　　10 A these B much C those D that

　　11 A increase B lower C meet D show

　　12 A strong B poor C weak D casual

　　13 A Asian B American C European D African

　　14 A new B organ C fatal D bowel

　　15 A factor B role C risk D chance

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1. B　　2. C　　3. B　　4. A　　5. B 6. D　　7. A　　8. C　　9. D　　10. C 11. A　 12. A　 13. C　 14. D　 15. B