单项选择题

A．if
B．until
C．that
D．unless
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单项选择题
Where did the conversation most probably take place
A．In a cotton field.
B．At a railway station.
C．On a farm.
D．On a train.
单项选择题
A．procedureB．processC．wayD．method
A．procedure
B．process
C．way
D．method
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