Read the passage and choose the best answers : Louis Braille was born in France in 1809 . His father had a small business . He made shoes and other things from leather . Louis liked to help his father in the store even when he was very small . One day when Louis was 3 years old , he was cutting some leather , suddenly the knife slipped and hit him in the eyes . He soon became completely blind . When he was ten years old , he entered the National Institute for the blind in Paris . One day his class went to visit a speacial exhibit by a captain in the army . One thing in the exhibit was very interesting for Louis . It showed messages in code . Armies send messages in secret codes so no - one else can read them . The captain wrote this code in raised letters on very thick paper . Louis thought a lot about this code . Then he decided to write in the same way so the blind could " read " with their fingers . It is very difficult to feel the differences between raised letters . Instead of letters , Louis used a " cell " of six dots . He arranged the dots with two dots across and three down . So blind people can read and write even write music by Braille . 1 . It is difficult to feel the differences between ................................ A . arrangements of dots B . coded messages C . raised letters D . a system of raised dots 2 . Louis Braille's father made things from ............................. A . codes B . exhibit C. leather D . wood 3 . Which of these sentences is probably not true ? A . Braille invented a system of reading for blind people . B . Braille system is used for everyone . C . Braille visited an exhibit of codes D . Braille was an intelligent boy . 4 . When Louis was ten years old , he began to study ...................................... A . at a local school B . at a special school for the blind . C . in the army D . at a university .