单项选择题

A．How Sony engineers improved sound quality.
B．How a popular product was invented.
C．How Masaru Ibuka made a design.
D．How Sony stereos became a raging success.
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单项选择题
A．A trip to the downtown of the city.B．A rise in postage.C．A forthcoming boat race.D．An unfortunate accident.
A．A trip to the downtown of the city.
B．A rise in postage.
C．A forthcoming boat race.
D．An unfortunate accident.
单项选择题
A．He was operating.B．He was with a patient.C．He was talking to his secretary.D．He was away on vacation.
A．He was operating.
B．He was with a patient.
C．He was talking to his secretary.
D．He was away on vacation.
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