单项选择题

A．Less than ten minutes.
B．About twenty minutes.
C．Forty-five minutes.
D．Over an hour.
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economics
单项选择题
A．It allowed workers to spend more time at home.B．It gave workers opportunity for better training.C．It enabled people to live far from their workplace.D．It eliminated many factory jobs.
A．It allowed workers to spend more time at home.
B．It gave workers opportunity for better training.
C．It enabled people to live far from their workplace.
D．It eliminated many factory jobs.
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