单项选择题

______ among the peasants for many years, he knew them very well.

A．Working
B．Having worked
C．To worked
D．Being worked
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______ the time I got to the cinema the film had been on for five minutes.
A．By
B．In
C．At
D．On
单项选择题
You seldom eat a fruit like this, ______ you
A．do
B．don't
C．are
D．aren't
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