Louis Braille was born in 1809 ………(21)……..a small town near Paris . He became blind when he was 4 years old because of an accident in his father’s workshop . When he was 10, he went to study at a special school for the ……(22)…… in Paris . In 1821 , a soldier named Charles Barbier came to give a talk at the school about “ night writing “, a system he had invented for soldiers to read at night . He was very interested in this system .Then , he worked very hard to ………(23) ………his own system for the blind to read . It was later named after him .In 1827, the first book in braille was …….(24)……. He became a teacher in the school ……..(25)….. he had been a student in Câu 21 : A. at B. in C.on D. for Câu 22 : A . mute B. blind C. deaf D. mentally retarded Câu 23 : A. discover B. invent C. realize D. spend Câu 24 : A. published B. attended D. arrived D. opened Câu 25 : A. which B. when D. whom D. where