单项选择题

From the conversation, what can be inferred about doctors in the Old West

A．They made their own medicines.
B．They experimented a lot.
C．They traveled by horse and buggy.
D．They were military officers.
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单项选择题
Why do successful language [earners find it easy to practice using the language regularly
A．They find it easy to communicate.
B．They look for exact information.
C．They want to teach the language to others.
D．They want to learn from the people who speak the language.
单项选择题
The rebels have funded much of their war effort through _________.
A．oil export
B．foreign aid
C．illicit diamond trading
D．robbing natives
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