单项选择题

A．Bikes were used for 150 years.
B．People were not so enthusiastic to bikes.
C．There were several bike booms in the U. S.
D．More people got to use cars.
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Those companies who can sell stock must have the authorized permission of ______.
单项选择题
A．They are in a good temper.B．They like music.C．They want to say something.D．They sing for enjoyment.
A．They are in a good temper.
B．They like music.
C．They want to say something.
D．They sing for enjoyment.
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