单项选择题

Flexible working hours were firstly used by the ______.

A．British
B．Americans
C．Germans
D．Japanese
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单项选择题
They asked her to ______ the facts as she remembered them.
A．set up
B．set off
C．set aside
D．set down
单项选择题
In order to stay healthy, it is a good idea ______ your doctor at least once a year.
A．visits
B．to visit
C．that visits
D．visited
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