单项选择题

Why is the reading system for the blind called the Braille

A．He hved in the 170Os.
B．He lived in the 1800s.
C．He lived in the 190Os.
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A．Teacher and student.B．Husband and wife.C．Salesman and customer.
A．Teacher and student.
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A．She is a film star.B．She is a musician.C．She is a football player.
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B．She is a musician.
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