单项选择题

It hard for the young people to imagine what severe conditions their parents once lived under.

A．sincere
B．hard
C．strict
D．tight
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Our examination has been postponed until next Friday.
A．put on
B．put down
C．put off
D．put in
单项选择题
They are still calculating the impact of automation on the lives of factory workers.
A．affect
B．influence
C．pressure
D．passion
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