Color blindness affects almost five percent of the (1)______ and far more men than women. Difficulty (2)______ between color, particularly red and green, is an interested (3)_____. It rarely causes (4) _______ problems. A child soon learns that grass is green and blood is (5)______ or that the top light is red and the bottom light is green on a column of (6)______ lights. For most people, there is problem living with color (7) ______. It does not (8)_____ a person becoming a lorry driver or a bus driver. Some color blind people even (9)_____ painters or fashion designers. There are a few jobs where perfect color (10)______is essential, such as an airline pilot or electrician.
1. A. people B. country C. population D. world
2. A. distinguishing B. extinguishing C. telling D. calling
3. A. effect B. defect C. influence D. affection
4. A. unimportant B. serious C. strict D. important
5. A. white B. yellow C. red D. blue
6. A. street B. traffic C. home D. office
7. A. light B. dumbness C. deafness D. blindness
8. A. prevent B. persuade C. encourage D. help
9. A. ignore B. stop C. give up D. become
10. A. vision B. division C. affection D. blindness
