单项选择题

A．Before 1860.
B．Before 1750.
C．Before 1890.
D．Before 1790.
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单项选择题
A．American history.B．European history.C．American Revolution.D．French Revolution.
A．American history.
B．European history.
C．American Revolution.
D．French Revolution.
单项选择题
A．It is popular among students.B．It demands a lot of time.C．It is very boring.D．It is easy.
A．It is popular among students.
B．It demands a lot of time.
C．It is very boring.
D．It is easy.
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