单项选择题

A．11 - week course for control duty.
B．11 - week course for patrol duty.
C．9 -week course for control duty.
D．9 -week course for patrol duty.
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单项选择题
A．Right now.B．This evening.C．This afternoon.D．Tomorrow mornin
A．Right now.
B．This evening.
C．This afternoon.
D．Tomorrow mornin
单项选择题
A．Gold was discovered.B．The Transcontinental Railroad was completed.C．The Golden Gate Bridge was constructed.D．Telegraph communications were established with the East.
A．Gold was discovered.
B．The Transcontinental Railroad was completed.
C．The Golden Gate Bridge was constructed.
D．Telegraph communications were established with the East.
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