单项选择题

Traditionally, a child is supposed to learn about the adult world ______.

A．through contact with society
B．gradually and under guidance
C．naturally and by biological instinct
D．through exposure to social information
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单项选择题
80（）

A．extensive
B．entire
C．overall
D．enormous
单项选择题
79（）

A．neither
B．either
C．one
D．each
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