单项选择题

A．Two to four months.
B．About three weeks.
C．At least half a year.
D．Two years or more.
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单项选择题
A．It went out of use 300 years ago.B．It was invented after the short bow.C．It was discovered before fire and the wheel.D．It’s still in use today.
A．It went out of use 300 years ago.
B．It was invented after the short bow.
C．It was discovered before fire and the wheel.
D．It’s still in use today.
单项选择题
A．Rome.B．London.C．Venice.D．Paris.
A．Rome.
B．London.
C．Venice.
D．Paris.
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