governments，media and people around the world have become very worried about something called sudan i ( 苏丹红1号).this chemical dye,_1_ in many food products, was said to _2_ cancer. newspapers told everyone to be careful andgovernments pulled this product off supermarket _3_.sudan i is a red dye used for _4_ oils, waxes, petrol, shoe and floor polishes(上光剂). scientists have found if used infood, it can _5_ an increased risk of cancer.on march 4, beijing’s food safety office said that it found the cancer-causing dye in meiweiyuan chili (红辣椒)sauce inthe city. now the _6_, famous us food company heinz, has recalled its chili sauces and chili oils sold in china.this follows news of food companies, including mcdonald ’s, _7_ some products in britain after finding the dye infrance was the first to _8_ the chemical dye in 2003. since then ，foods _9_ sudan i have been banned in the europeanunion._10_ experts say that people who have eaten any of the products should not _11_ too much. the cancer risk fromsudan i is very _12_，as only tiny amounts of it are used in foods.sudan i was banned from food products because experiments on rats _13_ that it could cause serious tumors (肿瘤).but，alan boobies，an expert in london，says there is little _14_ for the public to worry. he said that the levels fed tothe rats were in much，much bigger amounts _15_their body size. the amounts in food products eaten by humans are _16_.the rats that got tumors were given 30 milligrams of sudan i per kilogram of body weight ，every day for two years.animals given half the amount showed no _17_ of cancer.the tumors only _18_ in the rats after many months. for humans ，this means that if the dye were to have any _19_，it wouldtake around 20 years. professor boobis gives a _20_.”it’s just like the cancer risk linked with smoking just one cigarette in alifetime，”he said.

1. a. stuck b. stored c. found d. offered

2. a. produce b. cause c. make d. give

3. a. shelves b. cases c. storage d. tables

4. a. gluing b. gathering c. coloring d. conducting

5. a. allow for b. adjust to c. call for d. contribute to

6. a. seller b. producer c. customer d. farmer

7. a. breaking up b. putting out c. pulling away d. taking back

8. a. reject b. invent c. notice d. produce

9. a. causing b. including c. containing d. using

10. a. but b. also c. then d. so

11. a. complain b. disagree c. worry d. blame

12. a. high b. low c. common d. rare

13. a. guided b. guaranteed c. rated d. showed

14. a. concern b. reason c. cause d. right

15. a. compared to b. regardless of c. used to d. in spite of

16. a. none b. larger c. tiny d. more

17. a. signals b. marks c. symbols d. signs

18. a. produced b. developed c. made d. created

19. a. effect b. cause c. harm d. change

20. a. connection b. perception c. recognition d. comparison