单项选择题

Why is the reading system for the blind called the Braille

A．He was born blind.
B．He became blind as a result of an accident.
C．After taking some medicine, he became blind.
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单项选择题
A．He knows much about it.B．He knows nothing about it.C．He has a limited knowledge of it.
A．He knows much about it.
B．He knows nothing about it.
C．He has a limited knowledge of it.
单项选择题
A．In an operating room.B．In a doctor’s office.C．In a professor’s office.
A．In an operating room.
B．In a doctor’s office.
C．In a professor’s office.
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