单项选择题

A．They lived in large groups.
B．They used sand as insulation.
C．They kept fires burning constantly.
D．They faced their homes toward the south.
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单项选择题
A．A message from the outside world.B．A symbol of misfortune.C．A warning from the gods.D．A gift from the gods.
A．A message from the outside world.
B．A symbol of misfortune.
C．A warning from the gods.
D．A gift from the gods.
填空题
psychologists
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