单项选择题

Which form other than oral speech could be most commonly used among blind people()

A. Picture signs.
B. Braille.
C. Body language.
D. Signal flags.

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单项选择题

Henry Ford changed the American society ______.()

A. through numerous mechanical inventions
B. through automotive technological revolution
C. through great social revolution
D. through radical political reforms

单项选择题

Jordan grew much taller ______.()

A. after he joined NBA
B. in the first year in high school
C. in the second year in high school
D. in the first year in college