单项选择题

A．Family phone numbers.
B．Government service phone numbers.
C．Business phone numbers.
D．Professional services phone numbers.
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单项选择题
A．In 1809.B．In 1818.C．In the 1880s.D．In the 1890s.
A．In 1809.
B．In 1818.
C．In the 1880s.
D．In the 1890s.
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