56. What does the underlined word mean in paragraph one?
A. Causing cancer. B. Having side effect. C. Containing poison. D.Poisonous.
57. How did the Sudanª²1 get its name?
A. The dye is often produced in Sudan.
B. The dye has something to do with the country named Sudan.
C. Nobody is sure of the origin of the name.
D. Many foods produced in Sudan contain the dye.