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Are red-yolk eggs healthier?
Maybe not. In China, they may even have come to represent a __1__ danger-cancer.
Last month, a CCTV programme  __2__  that some red-yolk duck eggs from Hebei in Beijing markets
contained Sudan IV (苏丹红四号). Sudan IV is a dye (染料) that may give people cancer if eaten.
Beijing's food safety office soon found 1,159 kilograms of dyed eggs. They were produced  __3__
seven companies in Beijing and the provinces of Hebei, Anhui, Henan, Zhejiang and Hubei.
Sudan dye is __4__ in leather (皮革) and clothing industries. But they are banned (禁止) in food. The
World Health Organization has proved it might cause (导致) cancer.
How did the duck eggs get dyed? Police in Hebei  __5__ arrested (逮捕) one man. Because natural
Red-yolk eggs got a higher, price in the market, the man asked farmers __6__ red Sudan IV with the duck
feed. He promised to give a higher price to the farmers if they did so.
To make things safe,  10,400 ducks that had eaten  the dyed feed were  killed. Over 2,000  kilograms
of duck  eggs and  800 kilograms of feed were  destroyed (销毁) around the country.
The government alsoplans to __7__ on food production (生产) more often.  __8__  the near future,
according to new rules, every single egg in the market should __9__ given an "identity" (身份). Companies
need __10__ information like production date and the place the eggs were laid.

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