单项选择题

Long long ago, there were ______ people in the world.

A．a lot of
B．many
C．only a few
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单项选择题
Some people are moving back to small towns possibly because ______.
A．they like to live in quieter places
B．the cities are growing smaller
C．the cities do not need them
单项选择题
Before villages began people ______.
A．hunted for food
B．stayed in one place
C．lived together
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