English is spoken by pilots and airport control operators on all the air-ways of the world. Over 70 percent of the world’s mail is written in English. More than 60 percent of the world’s radio programs are in English. Clearly English is an international language.
A. English is very important for pilots.
B. English is spoken by airport control operators.
C. English is used more often in the world’s mail than in radio programs.
D. English is used everywhere in the world.