单项选择题

A．Finding a climbing partner.
B．Selecting the appropriate equipment.
C．Increasing upper-body strength.
D．Discussing popular climbing sites.
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单项选择题
A．In the early nineteenth century. B．In the late nineteenth century. C．In the early twentieth century. D．In the mid-twentieth century.
A．In the early nineteenth century.
B．In the late nineteenth century.

C．In the early twentieth century.

D．In the mid-twentieth century.
填空题
N
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